Patent Publication Number: US-2023151625-A1

Title: Assembly for erecting and dismantling a common tower adjacent a building structure and a method of erecting and dismantling the same

Description:
TECHNICAL FIELD 
     The present disclosure relates to common towers configured to allow hoisting facilities to be installed adjacent and along building structures, providing transportation of personnel and materials into high-rise buildings under construction. More particularly, the present disclosure relates to assemblies for erecting and dismantling common towers adjacent high-rise buildings under construct on and to methods of erecting and dismantling the same. 
     BACKGROUND 
     Common towers are well known in the art for aowing hoisting facilities, machines and/or equipment to be installed adjacent and along building structures. such as new building constructions and renovation projects, providing minimum interferences to the construction site itself. Such towers allow for transportation of personnel and materials into high-rise buildings under construction. 
     Hoisting facilities, machines ancifor equipment of all types may be tied to and grouped around common tower structures. Usage of a common tower therefore maximizes access to the building structure while minimizing the number and size of access openings provided into the building under construction. 
     Common towers found in the art that are configured to receive up to six hoisting equipment, each comprises a heavy mast structure (up to 400-500 pounds for a 5 feet mast section) that is adapted to receive the numerous flooring structures as well as the hoisting equipment themselves. 
     There is therefore a need for mast-free lighter assemblies and components configured to easily/safely erect and dismante common lowers such as to provide easy/safe transportation of personnel and materials into high-rise buildings under construction. 
     SUMMARY 
     It is an object of the present disclosure to provide an assembly for electing and dismantling a common tower adjacent a high-rise budding structure into construction that overcornee or mitigates one or more disadvantages of known common towers andior common tower assemblies or at least provides a useful alternative. 
     According to an embodiment, there is provided an assembly for erecting a common tower adjacent a building structure into construction, the assembly comprising:
         spaced apart columns configured to be spacedly and substantially vertically positioned adjacent the building structure;   vertically spaced apart flooring structures configured to be releasably and sirdably supported by the spaced apart columns, each flooring structure being configured to be capable of vertical displacement when supported by the spaced apart columns,   an anchoring system configured to be releasably connected to at least one of: the spaced apart columns and the vertically spaced apart flooring structures, the anchoring system being adapted to securely engage with the building structure to maintain the spaced apart columns substantially upright; and   protection structures configured to be connected to at least one of: the spaced apart columns and the vertically spaced apart flooring structures, each one of the protection structures being adapted to surround one of the flooring structures.       

     According to another embodiment, there is provided the assembly as defined above, wherein each one of the spaced apart columns comprises:
         a plurality of column hollow sections, each column hollow section being configured to be releasably connected to an adjacent one of the plurality of column hollow sections.       

     According to a further embodiment, there is provided the assembly as defined above, wherein each one of the spaced apart columns further comprises:
         a plurality of column section-to-section connecting members, wherein each one of the plurality of column section-to-section connecting members adapted to releasably engage one of the plurality of column hollow sections to tee adjacent one of the plurality of column hollow sections.       

     According to yet another embodiment, there is provided the assembly as defined above, wherein each one the plurality of column hollow sections defines inner surface an outer surface and comprises spaced apart longitudinal grooves radially aligned and formed within the outer surface. 
     According to another embodiment, there is provided the assembly as defined above. wherein each one the piurality of column hollow sections further comprises spaced apart openings longitudinally aligned within each one of the spaced apart long tudinas grooves. 
     According to a further embodiment, there is provided the assembly as defined above, wherein each one of the plurality of column section-to-section connecting members comprises:
         a hollow main body defining a main body outer surface: and   apertures formed within the hollow main body.       

     According to yet another embodiment, there is provided the assembly as defined above. wherein the main body outer surface is adapted to interface with the inner surface of each one of the plurality of column hollow sections. 
     According to another embodiment, there is provided the assembly as defined above, wherein each one of the plurality of column hollow sections defines a section first end and a section second end, the assembly further comprising:
         base members adapted to receive the section first end and the section second end of the plurality of column hollow sections, and therefore adapted to support the spaced aped columns.       

     According to a further embodiment, there is provided the assembly as defined above, further comprising pin-like members adapted to releasabiy connect the one of the plurality of column hollow sections to the adjacent one of the plurality of column Srollow sections usirij one of the plurality of column section-to-section connecting members by introducing each pin-tike member in two of the spaced apart openings and further in two of the apertures to provide an end-to-end releasable connection between the one of the plurality of column hollow sections and the adjacent one of the plurality of column hollow sections. 
     According to yet another embodiment, there is provided the assembly as defined above, wherein each one of the vertically spaced apart flooring structures comprises:
         primary beam sections, wherein each one of the primary beam sections defines a beam first end and a beam second end, the beam first end being adapted to releasably and slidably engage with one of the spaced apart columns, the beam second end being adapted to releasably and slidably engage with an adjacent one of the spaced apart columns; and   sliding members adapted to be releasably connected to the beam first end and the beam second end of each one of the primary beam sections, wherein each one of the sliding members is further adapted to releasably and slidably engage with the spaced apart columns.       

     According to another embodiment, there is provided the assembly as defied above. wherein each one of the sliding members comprises:
         a sliding member main body, and   a longitudinal sliding surface extending from the sliding member main body and adapted to releasably and stidably engage with the spaced apart longitudinal grooves.       

     According to a further embodiment, there is provided the assembly as defined above, wherein the sliding member main body defines a sliding member first end and a sliding member second end and further comprises:
         a first spring loaded pin about the sliding member first end, and   a second spring loaded pin about the sliding member second end, tne first and second spring loaded pins being adapted to engage with two of the spaced apart openings of one of the plurality of column hollow sections, wherein when the first and second spring loaded pins are disengaged from the one of the plurality of column hollow sections, the beam first end of the beam second end of one of the primary beam sections is capable of vertical displacement when supported by the spaced apart columns.       

     According to yet another embodiment, there is provided the assembly as defined above, wherein:
         each one of the sliding members comprises spaced apart sliding member apertures Formed within the sliding member main body; and each one of the primary beam sections comprises corresponding spaced apart beam apertures at its beam first and second ends; the assembly further comprising:   additional pin-like members for releasably connecting one of the sliding members wee the first or the seeorel beam end by providing one of the additional pin-like niernbefe to be introduced in one of the spaced apart sliding member aperture that is aligned with one of the corresponding spaced apart beam apertures.       

     According to another embodiment, there is provided the assembly as defined above, wherein each one of the vertically spaced apart flooring structures further comprises secondary beam sections to be releasably connected to at least some of the primary beam sections for securing the primary beam sections together. 
     According to a further embodiment, there is provided the assembly as defined above, wherein each one of the vertically spaced apart flooring structures further comprises primary spaced apart floor supporting elongated members to be releasably connected to the pnmary beam sections. 
     According to yet another embodiment, there is provided the assembly as defined above, wherein each one of the vertically spaced apart flooring structures further comprises flooring elements to be connected to the primary supporting elongated members. 
     According to another embodiment, there is provided the assembly as defined above, wherein each one of the protection structures comprises:
         a plurality of horizontally oriented members and a plurality of vertically oriented members forming together a main frame defining a plurality of spaced apart access openings, and   a meshed structure mounted on the main frame.       

     According to a further embodiment there is provided the assembly as defined above, further comprisng a protection enclosure configured to be releasably and slidabty supported by the spaced apart columns, the protection enclosure being configured to be capable of vertical displacement when supported by the spaced apart columns. 
     According to yet another embodiment, there is provided the assembly as defined above, wherein the protection enclosure comprises.
         a protection enclosure, main frame defining a pturality of access openings and configured to releasably and stidably engage with the spaced apart longitudinal grooves;   a roofing structure extending from the enclosure main frame; and   lifting assembles to be operatively coupled to the protection enclosure main frame and further to the spaced apart columns;   wherein when the protection enclosure main frame is supported by the spaced apart columns, the protection enclosure main frame is capable of vertical displacement between a protection enclosure lower position and a protection enclosure upper position when the lifting assemblies are extended from a compressed position to an extended position.       

     According to another embodiment, there is provided the assembly as defined above, wherein each one of the lifting assemblies comprises:
         an elongated jack defining a first jack end and a second jack end;   an upper slider adapted to be releasably connected to the first jack end and the protection enclosure main frame and further adapted to releasably and slidably engage with the spaced apart longitudinal grooves; and   a lower slider adapted to be releasably connected to the second jack end and further adapted to releasably and slidably engage with the spaced apart longitudinal grooves at a distance from the upper slider.       

    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Further features and advantages of the present disclosure will become apparent from the following detailed description, taken in combination with the appended drawings in which. 
         FIG.  1    is a top perspective view of a common tower in accordance with an embodiment, where three common tower floors are illustrated; 
         FIG.  2    is a side elevation view of the common tower shown in  FIG.  1   ; 
         FIG.  3    is a perspective view of one common tower floor in accordance with another embodiment; 
         FIG.  4 A  is a perspective view of a column hollow section in accordance with a further embodiment; 
         FIG.  4 B  is a top plan view of the column hollow section shown in  FIG.  4 A ; 
         FIG.  4 C  is an elevation view of the column hollow section shown in  FIG.  4 A , that is releasably connected to a column base member; 
         FIG.  4 D  is a top perspective view of the colomn hollow section shown in  FIG.  4 C , that is releasably connected to the column base member; 
         FIG.  4 E  is a top plan view of the column hollow section shown in  FIG.  4 C , that is releasably connected to the column base member; 
         FIG.  4 F  is a perspective view of the column section-to-section connecting member shown in  FIGS.  4 C- 4 E , which is adapted to reloasably connect adjacent column hollow sections together; 
         FIG.  4 G  is an elevation view of the column section-to-section connecting member shown in  FIG.  4 F ; 
         FIG.  4 H  is a top plan view of the column section-to-section connecting member shown in  FIG.  4 F ; 
         FIG.  4 I  is a perspective view of adjacent column hollow sections that are releasably connected one to another; 
         FIG.  4 J  is a perspective view of the column base member shown in  FIGS.  4 C- 4 E ; 
         FIG.  4 K  is a perspective view of adjacent column hollow sections that are to be releasably connected together using the column section-to-section connecting member along with a plurality of pin-like members; 
         FIG.  4 L  is a perspective view of a column hollow section that is to be releasably connected with the column base member; 
         FIG.  5 A , is a perspective view of a itooring structure that is re leasabiy and slidably connected to the spaced apart columns, where the flooring structure is illustrated in its lowermost position; 
         FIG.  5 B  is a perspective view of the flooring structure shown in  FIG.  5 A  that is releasabty arid slidabiy connected to the spaced apart columns, where the flooring structure is illustrated in its uppermost position; 
         FIG.  6 A  is a perspective view of the primary beam sections (or primary ianding beam sections) that together form a deck supporting structure; 
         FIG.  6 B  is a top plan view of the primary beam sections shown in  FIG.  6 A ; 
         FIG.  7 A  is a perspective view of the primary beam sections and further of the secondary beam sections (or secondary landing beam sections) that together form the deck supporting structure; 
         FIG.  7 B  is a top plan view of the primary beam sections and further of the secondary beam sections shown in  FIG.  7 A ; 
         FIG.  8 A  is a perspective view of a sliding member in accordance with yet another embodiment; 
         FIG.  8 F  is an elevation view (side to be connected to primary beam end) of the sliding member shown in  FIG.  8 A ; 
         FIG.  8 C  is a side elevation view of the sliding member shown in  FIG.  8 A ; 
         FIG.  8 D  is a top plan view of the sliding member shown in  FIG.  8 A , 
         FIG.  8 E  is a perspective view of a sliding member that is to be releasably connected to a primary beam section and that is further adapted to be releasably and slidably connected to a column for installation of the flooring structure; 
         FIG.  9 A  is a top perspective view of a main deck and of a secondary deck that are adapted to be releasably mounted on the deck supporting structure shown in  FIGS.  7 A- 7 B . 
         FIG.  9 B  is a bottom perspective view of the main deck and of the secondary deck shown in  FIG.  9 A  that are adapted to be releasably mounted on the deck suppcirting structure shown in  FIGS.  7 A- 7 B . 
         FIG.  9 C  is a closed-up perspective view of primary and secondary floor supporting elongated members (the ledger beams) shown in  FIG.  9 B  that are releasably mounted on the primary beam sections; 
         FIG.  9 D  is an elevation view of a primary/secondary floor supporting elongated member shown in  FIG.  9 B  that is releasably mounted on a primary beam section; 
         FIG.  10 A  is a perspective view showing a flooring structure that is to be releasably and slidably connected to a column; 
         FIG.  10 B  is a top plan view of the flooring structure shown in  FIG.  10 A  that is releasably and slidably connected to the column; 
         FIG.  11 A  is a top perspective view of a protection structure adapted to surround main and secondary decks being part of the flooring structure in accordance with another embodiment; 
         FIG.  11 B  is top plan view of the protection structure shown in  FIG.  11 A ; 
         FIG.  11 C  is an elevation view of the protection structure shown in  FIG.  11 A ; 
         FIG.  12    is a top plan view of the common tower shown in  FIGS.  1  and  2   , where six hoisting machines that are tied to and grouped around the tower are schematically illestrated, 
         FIG.  13    is a top plan view of a common tower that is assembled/erected and mounted/positioned adjacent a building structure, showing six hoisting equipment. facilities and/or machines tied to and grouped around the tower. 
         FIG.  14 A  is an elevation view of a protection enclosure that is adapted to be releasably and slidably connected to the partly assembled columns as the common tower is erected; 
         FIG.  14 B  is another elevation view of the protection enclosure shown in  FIG.  14 A ; 
         FIG.  14 C  is a further elevation view of the protection enclosure shown in  FIG.  14 A ; 
         FIG.  14 D  is a cross-sectional view of the protection enclosure shown in  FIG.  14 A , taken along line A; 
         FIG.  14 E  is a cross-sectional view of the protection enclosure shown in  FIG.  14 A , taken along line B. 
         FIG.  14 F  is a cross-sectional view of the protection enclosure shown in  FIG.  14 A , taken along line C; 
         FIG.  14 G  is a cross-sectional view of the protection enclosure shown in  FIG.  14 A , taken along line D; 
         FIG.  15 A  is a closed-up view of the protection enclosure shown in  FIGS.  14 A- 14 C , showing lifting assemblies that are positioned in their compressed positions. 
         FIG.  15 B  is a closed-up view of (he protection enclosure shown in  FIGS.  14 A- 14 C , showing lifting assemblies that are positioned in their extended positions. 
         FIG.  15 C  is a closed-up view of the lifting assemblies shown in  FIGS.  15 A- 15 B . 
         FIG.  16 A  ilustrates a method of erecting a common tower using a common tower assembly, where the protection enclosure shown in  FIGS.  14 A- 14 G  is releasaoly and slidabiy connected to the partly assembled spaced apart columns; 
         FIG.  16 B  illustrates a method of erecting a common tower using a common lower assembly, where the protection enclosure shown in  FIGS.  14 A- 14 G  is releasably and slidably connected to the partly assembled spaced apart columns; 
         FIG.  16 C  illustrates a method of erecting a common tower using a common tower assembly, where the protection enclosure shown in  FIGS.  14 A- 14 G  is releasabq and slidably connected to the partly assembled spaced apart columns; 
         FIG.  16 D  illustrates a method of erecting a common tower using a common tower assembly, where the protection enclosure shown in  FIGS.  14 A- 14 G  is releasably and slidably connected to the partly assembled spaced apart columns; and 
         FIG.  16 E  illustrates a method of erecting a common tower using a common tower assembly, where the protection enclosure shown in  FIGS.  14 A- 14 G  is releasably and slidably connected to the partly assembled spaced apart columns 
     
    
    
     DETAILED DESCRIPTION 
     Referring now to the drawings and more particularly to  FIGS.  1  and  2   , there is shown an assembled/erected common tower  10 , or tower  10 , which is configured to be mounted/positioned adjacent a high-rise building structure in construction (not shown), such as adjacent a new buifding construdion or adjacent a renovation project. Up to six hoisting equipment, facilities andior machines of ail types may thus be tied to and grouped around tower  10  once assembled/erected. 
     Still referring to  FIGS.  1  and  2   , there is shown that tower  10  comprises four spaced apart columns  12   a ,  12   b ,  12   c ,  12   d  adapted to be spacedly and vertically positioned adjacent the building structure and a plurality of vertically spaced apart flooring structures  14   a ,  14   b ,  4   c  which are releasably and slidably supported by spaced apart columns  12   a ,  12   b ,  12   c ,  12   d  Columns  12   a ,  12   b ,  12   c ,  12   d  together with flooring structures  14   a ,  14   b ,  14   c  define three common tower floors  13   a ,  13   b ,  13   c . A person skilled in the art to which tower  10  pertains (provided for high-rise building constructions) would understand that even if only three flooring structures  14   a ,  14   b ,  14   c . or common tower floors  13   a ,  13   b ,  13   c  are shown in  FIGS.  1  and  2   , tower  10  may include two flooring structures or more (or two common tower floors or more), as long as it provides the needed number of flooring structures to fully support the hoisting equipment aiong the building structure, which itself incudes predetermined number of building levels. Generally, tower  10  will include a number of flooring structures (or a number of common tower floors) that corresponds to the number of levels associated with the high-rise building structure. 
     As better shown in  FIG.  3   , where only one flooring structure  14   a  and only one common tower floor  13   a  are illustrated, tower  10  further comprises an anchoring system  18  which is adapted to be fixed to (to securely engage) the budding structure to maintain colerrins  12   a ,  12   b ,  12   c ,  12   d  as well as flooring structure  14   a  upright. Each common tower floor (one common tower floor shown in  FIG.  3   ) may include its own anchoring system  18 , but atternatively, only some of the common tower floors may include an anchoring system  18 , as long as the plurality of anchoring systems  18  together provide sufficient strength to maintain tower  10  upright adjacent the building structure (usually provided where elevator&#39;s anchors are provided). Additionally, it is to be noted that a person skilled in the art to which tower  10  pertains would understand that even four spaced apart columns  12   a ,  12   b ,  12   c ,  12   d  are in  FIGS.  1  and  2   . three or more columns may be used to assemble/erect such a common tower. According to these plurality of scenarios, less or more hoisting equipment may be tied to and grouped around the common tower. Moreover such as to increase the number of hoisting equipment that may be tied to, and grouped close to, the building structure, more than one common tower  10  may be positioned adjacent one to the other. For example, a second tower  10  may be installed adjacent a first cornmon tower  10  (where first common tower  10  is found to be adjacent building structure). using columns  12   a ,  12   d . According to such a scenario, for one common tower Woe only six columns would support two horizontally aligned flooring stroctures such as to provide ten individual accesses to the building stroolure Such second tower  10  may also be provided to support a stairwell or a stair ease opening, for example. 
     Still referring to  FIGS.  1  and  2   , there is shown that tower  10  further comprises protection structures  20   a ,  20   b ,  20   c  which are releasabiy mounted on each flooring structure  14   a ,  14   b ,  14   c  and/or columns  12   a ,  12   b ,  12   c ,  12   d  so as to upwardy extend frorn the floreing structures. Each protection structure is adapted to surround a main deck, and alternatively a secondary deck, being part of the flooring structure, as it will be described in more details below. Protection needs may vary from one common lower to another, such as to accommodate different hoisting needs As it will be described in more details below tower  10  further comprises a plurality of connectors releasably connecting the multiple components together. namely, columns  12   a ,  12   b ,  12   c ,  12   d , floorang structures  14   a ,  14   b ,  14   c , anchoring system  18 , and protection structures  20   a ,  20   b ,  20   c . Moreover, as it wilt be shown, many of the connectors provided to assemble/erect and disassemble/dismantie tower  10  are secured to columns  12   a ,  12   b ,  12   c , flooring structures  14   a ,  14   b ,  14   c , anchoring system  18 . and/or protection structures  20   a ,  20   b ,  20   c , providing a safer use of lower  10 , during and after its erection. 
     Referring now more particularly to  FIGS.  4 A to  4 L . there is shown that each column  12   a ,  12   b ,  12   c ,  12   d  is made from a plurality of longitudinally aligned column hollow sections  24  (lower column hollow section  24  and upper column hollow section  24  shown in  FIGS.  4 I,  4 K ). 
     As well illustrated in  FIGS.  4 A,  4 B , each column hollow section  24  defines a column section axis  25  Each column hollow section  24  is further configured to be releasably connected/assembled to an adjacent column hollow section  24 . Indeed, each column  12   a ,  12   b ,  12   c ,  12   d  further comprises a plurality of column section-to-section connecting members ( FIGS.  4 F,  4 G,  4 H ). Each column section-to-section connecting member  26  is adapted to releasably engage with two adjacent column hollow sections ( FIG.  4 K ). 
     As weil illustrated in  FIGS.  4 A- 4 E , each column hollow section  24  defines an inner surface  27 . an outer surface  28  and four spaced apart longitudinal grooves  30   a ,  30   b ,  30   c ,  30   d  (the primary lonoitudinal grooves) radially aJigned and formed within outer surface  28  (along overall length of column hollow section  24 ). Each column hollow section  24  further defines four spaced apart longitudinal grooves  31   a ,  31   b ,  31   c ,  31   d  (the secondary longitudinal grooves), formed inbetween longitudinal grooves  30   a ,  30   b ,  30   c ,  30   d  As better shown in  FIGS.  4 A,  4 C,  4 D , spaced apart openings  32  are longitudinally aligned within longitudinal grooves  30   a ,  30   b ,  30   d , Openings  33  are further formediprovided wthin longitudinal grooves  31   a ,  31   b ,  31   c ,  31   d.    
     Referring now more particularly to  FIGS.  4 F,  4 G,  4 H , there is shown that column section-to-section connecting member  26  comprises a hollow main body  34 , a first set of apertures  36  and a second set of apertures  37  formed therethrough Each column section-to-section connecting member  26  defines a connecting member axis  29  ( FIG.  40   ). As shown in  FIG.  41   , two adjacent column hollow sections  24  are releasably secured together via a firstriower column section-to-section connecting member (not shown), and a third column hollow section (not shown) may be releasably secured to hollow main body  34  of second/upper column section-to-section connecting member  26 . For example, for each column  12   a ,  12   b ,  12   c ,  12   d  two column hollow sections  24  may be longitudinally aligned and releasably secured together for each one of the common tower floors, as one column hollow section may have a length, for example, of about 6 feet. More or less column hollow section(s) may however he used to assernblelerect one common tower floor. Still referring to  FIGS.  4 F- 4 H , there is shown that hollow main body  34  defines a main body outer surface  38  adapted to interface with inner surface  27  of column hollow sections. 
     Referring now to  FIG.  4 A , there is shown that each one of the plurality of column hollow sections  24  together forming the spaced apart columns  12   a ,  12   b ,  12   c ,  12   d . defines a first end/edge (or lower end/edge)  41   a  and a second endiedge (or upper end/edge)  41   b  Therefore each column  12   a ,  12   b ,  12   c ,  12   d  may be supported by a column base member  40   a ,  40   b ,  40   c ,  40   d  ( FIGS.  1  and  2   ), the column base member  40  ( FIGS.  4 C   4 D,  4 E,  4 J,  4 L) that is adapted to receive first or second ends  41   a ,  41   b  of column hollow sections  24  (as each column hollow section is symmetric) Indeed, it is important to be mentioned that column hollow sections  24  forming columns  12   a ,  12   b ,  12   c ,  12   d  are identical and symmetric, so they are all configured to interface/interconnect with column base members  40   a ,  40   b ,  40   c ,  40   d  (which are also identical/syrnmetric). As shown more particularly in  FIGS.  4 C- 4 E,  4 J,  4 L , each column base member  40  includes a plate member  43  and a hollow base structure  45  which upwardly extends from plate member  43  when column base member  40  is positioned on the surface adjacent the building structure, with two sets of vertically aligned apertures  47  formed therethrough. 
     Therefore, when assembling a column hollow section  24  with a column base member  40 . column base member  40  is positioned on a surface adjacent the building structure. First section end  41   a  of column hollow section  24  is introduced within hollow base structure  45  of column base member  40  and releasably secured introducing bolts within first and second sets of apertures  47  formed within hollow base structure  45  and further the lower ones of the spaced apart openings  32  found iongitodinal grooves  30   a ,  30   b ,  30   c ,  30   d  ( FIG.  4 L ). A person skilled in the art to which common tower  10  pertains would however understand that other securing members and/or mechanisms may be used in a way to releasably secure a column hollow section end to a column base member  40  in a way to support each one of columns  12   a ,  12   b ,  12   c ,  12   d.    
     Referring now more particularty to  FIG.  4 K , column section-to section connecting member  26  is then introduced within column hollow section  24  about at its second end  41   b  in a way that outer surface  38  defined by hollow main body  34  interfaces with inner surface  27  defined by column hollow section  24 . First/lower end  41   a  of an adjacent/upper column hollow section  24  is then positioned over column section-to-section connecting member  26 , until firstilower end  41   a  (or edge) of upper column hollow section  24  interfaces with second/upper end  41   b  (or edge) of lower column hollow section  24 . Still referring to  FIG.  4 K , height pin-like members  46  are introduced in spaced apart openings  32  (formed within longitudinal grooves  30   a ,  30   b ,  30   c ,  30   d ) that are aligned with first set of apertures  36  (formed within hollow main body  34 ), such as to secure upper and lower column hollow sections  24  to (over) column section-to-section connecting member  26 . It is important to be mentioned that pin-like members  46  are linked by chains, steel wires or any other connections, so that no connector may fall from tower  10  during/after its erection/assembly (or during stops of assembling column hollow sections together). An upper column section-to-section connecting member  26  ( FIG.  41   ) is introduced within upper column hollow section  24  about its secoridlupper end  41   b , as defined above, and by aligning their respective column section axis  25  and connecting member axis  20  Therefore, when columns  12   a ,  12   b ,  12   c ,  12   d  are assembled and aligned together, column section-to-section connecting members  26  are concentric with longitudinally aligned column hollow sections  24  that are longitudinally aligned one over another ( FIG.  4 E ) The remaining column hollow sections for each column  12   a ,  12   b ,  12   c ,  12   d  will be installed after one flooring structure, or alternatively two flooring structure(s), is/are releasably and slidably supported by the first two column hollow sections  24  of each column  12   a ,  12   b ,  12   c ,  12   d . In other words. one common tower floor may be assembled/erected at a time. Additionally, is to be mentioned that even if column base member  40  was described as firstly connected with first/lower column hollow section  24  it is further possible to releasably connect first/lower and second/upper column hollow sections  24  together first. and then to secure lower end  41   a  of one of the two column hollow sections  24  with column base member  40 . 
     Referring now more particularly to  FIGS.  5 A and  5 H , as mentioned above, tower  10  comprises a plurality of vertically spaced apart flooring structures ( 14   a ,  14   b ,  14   c  shown in  FIGS.  1  and  2   ), referred to as  14  in  FIGS.  5 A and  56    Indeed,  FIGS.  5 A and  5 B  illustrate flooring structure  14  that is releasably and slidably supported by and/or connected to spaced apart columns  12   a ,  12   b ,  12   c ,  12   d . Flooring structure  14  shown in  FIG.  5 A  is illustrated in its lowermost positron, while flooring structure  14  shown in  FIG.  5 B  is illustrated in its uppermost position. 
     Referring now more particularly to  FIGS.  6 A and  6 D , there is shown that flooring structure  14  is made of four primary beam sections  48   a ,  48   b ,  48   c ,  48   d , and a fifth primary beam section  48   e , namely the primary landing beam sections, that will be, once slidably mounted on columns  12   a ,  12   b ,  12   c ,  12   d , perpendicularly ( 48   a ,  48   b ,  48   c ,  48   d ) assernbtad one about another in the scenario where four columns are provided) Each one of plummy beam sections  48   a ,  48   b ,  48   c ,  48   d ,  48   e  defines a beam first end  50   a ,  50   b ,  50   c ,  50   d ,  50   e  and a beam second end  52   a ,  52   b ,  52   c ,  52   d ,  52   e  Beam first ends  50   a ,  50   b ,  50   c ,  50   d  are adapted to releasably and slidably engage with a respective column  12   a ,  12   b ,  12   c ,  12   d , while beam second ends  52   a ,  52   b ,  52   c ,  52   d  are adapted to releasably and slidably engage with an adjacent one of the spaced apart columns  12   a ,  12   b ,  12   c ,  12   d . In other words, still referring to  FIGS.  6 A and  6 B , ends  50   a ,  52   d  of primary beam sections  48   a ,  48   d  are adapted to releasably and slidably engage with column  12   a . ends  52   a ,  50   d  of primary beam sections  48   a ,  48   b  are adapted to reteasabiy and slidably engage with column  12   b , ends  52   b .  50   c  of primary beam sections  48   b ,  48   c  are adapted to releasably and slidably engage with column  12   c  and ends  52   c ,  50   d  of primary beam sections  48   c ,  48   d  are adapted to releasably and sliciably engage with column  12   d , thanks to sliding members  54   a ,  54   b ,  54   c ,  54   d ,  54   e ,  54   f ,  54   g ,  54   h  that wilt be described in more details below 
     Now referring to  FIGS.  8 A- 8 F , there is shown that each primary beam section  48   a ,  48   b ,  48   c ,  48   d  is configured to be releasably and slidably connected to or supported by two adjacent columns  12   a ,  12   b ,  12   c ,  12   d  by releasably connecting a sliding member  54   a ,  54   b ,  54   c ,  54   d ,  54   e ,  54   f ,  54   g ,  54   h  to a beam first or second end  50   a ,  50   b ,  50   c ,  50   d ,  52   a ,  52   b ,  52   c ,  52   d  and by releasably and slidably connecting the sliding member to a colurne  12   a ,  12   b ,  12   c ,  12   d . Indeed, each slidrng member, referred to as siiding member  50  in  FIGS.  8 A- 8 E , comprises a sliding member main body  55  and a longitudinal sliding surface of elongated portion  56  extendind from the sliding member main body  55  Longitudinal sliding surface or elongated portion  56  is configured to releasably and slidably engage with spaced apart longitudinal grooves  30   a ,  30   b ,  30   c ,  30   d . A person skilled in the art to which tower  10  pertains would here understand that even if sliding surface or elongated portion  56  is shown to adopt a T-like shape, sliding surface or elongated portion  56  may adopt any cross-sectional size. shape and/or configuraton, as long as it can be introduced in, and secured to, longitudinal grooves  30   a ,  30   b ,  30   c ,  30   d  of a column hollow section  24  in a downward or upward sliding movement relatively to columns  12   a ,  12   b ,  12   c ,  12   d , such as to provide a strong connection between sliding member  54  and columns  12   a ,  12   b ,  12   c  or  12   d  when sfiding member  54  is pulled away from its respective column (or alternatively pushed upward or downward within grooves  30   a ,  30   b ,  30   c ,  30   d ). 
     Still referring to  FIGS.  8 A- 8 E , sliding member main body  55  further defines a beam receiving groove  57  (opposite longitudinal sliding surface or portion  56 ), a sliding member first/upper end  58  and a sliding member second/lower end  64 ) Each sliding member  54  thus further comprises a first spring loaded pin  62  operatively mounted on sliding member main body  55  about sliding member upper end  58  and a second spring loaded pin  64  also operatively mounted on sliding member main body  56  about sliding member lower end  60 . First and second sprtng loaded pins  62 ,  64  are adapted to engage with two of the spaced apart openings  32  formed within each one of the longitudinally aligned column hollow sections  24 . Therefore, when first and second spring loaded pins  62 .  64  are disengaged from longitudinally aligned column hollow sections  24  or columns  12   a ,  12   b ,  12   c ,  12   d , primary beam sections  48   a ,  48   b ,  48   c ,  48   d  are capable of horizontal displacement relatively to spaced apart columns  12   a ,  12   b ,  12   c ,  12   d . One may pull first or second spring loaded pin  62 ,  64  to disengage spring loaded pins  62 ,  64 , or may turn it to lock in place. Height of each flooring structure relatively to the ground surface of to an adjacent flooring structure may thus be adjusted independently, so it is possible to make correspond the common tower floors with the building levels of the high-rise building into construction. Indeed. a penthouse or a mechanical room, usually provided with high ceilings. for example, will require the distance between two adjacent common tower floors to be increased 
     Still referring to  FIGS.  8 A- 8 E , each sliding member  54  further comprises spaced apart sliding member apertures  66  formed through beam receiving groove  57  of sliding member main body  55  (opposite longitudinal sliding surface or portion/connector  56 ), while primary beam sections  48   a ,  48   b ,  48   c ,  48   d  (illustrated as  48 ) eacn comprises corresponding spaced apart beam apertures  68  ( FIG.  8 E ) at their beam first and second ends ( 50   a ,  50   b ,  50   c ,  50   d ,  52   a ,  52   b ,  52   c ,  52   d ), in  FIG.  8 E  illustrated as  50 . Therefore, additional pin-like members  70  are here used to releasably connect sliding member  54  with beam end  50  that is introduced within beam receiving groove  57 . Pin-like members  70  are introduced within spaced apart sliding member apertures  66  and further within corresponding spaced apart beam apertures  68  that are aligned one with another, such as to provide a ‘beam-to-sliding member’ assembly it is further important to be mentioned that pin-like members  70  are fixed/secured to sliding member  54  using chains  71  or similar elements, and that first and second spring loaded pins  62 ,  64  are integrated into sliding member main body  55  so that security during installation is increased (no such connector can fail from tower  10  during or after its erection) It is further important to be mentioned that sliders  54  are symmetrically formed, so it can be oriented according to two different positions (spring loaded pin  62  above spring loaded pin  64 , or below spring loaded pin  62 , when installed on column/beam). Such syrnmetricity of the column hollow sections  26 , but further of the sliding members  54 , makes it easier to assemble components of tower  10  together. 
     Referring now more particularly to Fieures  7 A and  7 B, there is shown that flooring structure  14  further comprises a plurality of secondary beam sections  72 , namely the secondary landing beam sections, which are releasably connected to primary beam sections  48   a ,  48   b ,  48   c ,  48   d ,  48   e  (via connectors  73 ) in a way to secure the primary beam sections together before, during and after their releasable sliding connection with columns  12   a ,  12   b ,  12   c ,  12   d . The secondary beam sections together with the primary beam sections (first and second landing beams) together form the deck supporting structure. 
     Now referring to  FIGS.  9 A and  9 B , there is shown that each flooring structure  14  (here illustrated as comprising a main deck  49  and a secondary deck  61  or deck extension, that extends from primary dock  49 ) further comprises a plurality of spaced apart primary floor supporting elongated members  74 , namely the primary ledger beams which are configured to be releasably supported by or mounted on, primary beam sections  48   a ,  48   b ,  48   c ,  48   d ,  48   e  or at least some of them (and further supported by secondary beam sections  72 ) Flooring structure  14  further comprises a plurality of spaced apart secondary floor supporting elongated members  76  namely the secondary leger beams, which are configured to he supported by, or mounted on, a primary beam section ( 48   a ) and perpereacularly and releasably connected to a primary floor supporting eloneated member  74  (the one adjacent primary beam section  48   a ). 
     As better shown in  FIGS.  9 B,  9 C and  9 D , each primary/secondary floor supporting elongated member  74 ,  76  ( FIG.  9 D ) comprises a base member  80 , a wall section  82  which upwardly extends from base member  80 , and a top member  84  supported by (extending from) wail section  82  Top member  84  defines a top member longitudinal groove  86  which is adapted to receive an elongated wood strip  88 . Flooring structure  14  therefore further comprises a plurality of pressure release connectors  90  ( FIGS.  9 B,  9 D ) that are adapted to releasably connect with respectively the primary floor supporting elongated members  74 , the primary ledger beams. and the primary beam sections ( 48   b ,  48   c ,  48   e ) in order to releasably connect primary/secondary floor supporting elongated members  74 .  76  to, or to mount them on. primary beam sections and the secondary beam seconds  72 . Indeed, referring to  FIG.  9 B , there is shown that, for each primary floor supporting elongated member  74 . two pressure release connectors  90  are releasably connected thereon (one at each end) so the primary/secondary floor supporting elongated members may be releasably connected to primary beam sections  48   b ,  48   d ,  48   e , 
     Still referring to  FIGS.  9 A and  9 B . there is shown that flooring structure  14  further comprises a plurality of flooring elements  78   a ,  78   b  that can be supported by or fixed (secured to) the primary and secondary floor supporting elongated members  74 .  76 . A first layer of flooring elements  78   a  such as, without limitation, wood planks, are fixedly or releasably secured (using nails, screws or the like) on a perpendicular manner on top of primary and secondary floor supporting elongated members  74 ,  76  by nailing or screwing flooring elements  78   a  onto elongated wood strips  88  that are introduced within top member longitudinal groove  86  of primary and secondary floor supporting elongated members  74 ,  76  ( FIGS.  9 C and  9 D ). A second layer of flooring elements  78   b  such as, without limitation. plywood sheets, are fixedly or releasably secured (using nails, screws or the like) on top of first layer of flooring elements  78   a.    
     Still referring to  FIGS.  9 A and  9 B  flooring structure  14  may include a main deck  49  and further a deck extension  51  that may be releasably connected to main deck  49  Main deck  49  will be responsible of regrouping/receiving the hoisting equipment. while deck extension  51  will be responsible of providing a bridge between main deck  49 , receiving workers and materials, and the building structure itself. 
     Therefore, when assembling the components of flooring structure  14  together, sliding members  54   a ,  54   b ,  54   c ,  54   d ,  54   e ,  54   f ,  54   g ,  54   h  are releasably connected to their respective beam first and second ends  50   a ,  52   a ,  50   b ,  52   b ,  50   c ,  52   c ,  50   d ,  52   d  ( FIGS.  6 A and  6 B ), using pin-like members  70 , as they are here used to releasably connect each sliding member  54  with a beam end  50  that is introduced within beam receiving groove  57  of sliding member  54  ( FIG.  8 E ). Pin-like members  70  are introduced within spaced apart sliding member apertures  66  and further within corresponding spaced apart beam apertures  68  that are aligned one with another. 
     As shown in  FIGS.  7 A and  7 B , primary beam sections  48   a ,  48   b ,  45   c ,  48   d ,  48   e  (primary landing beams) are perpendicularly positioned one relatively to another so that the plurality of secondary beam sections  72  (secondary landing beams) may releasably connect the primary beam sections  48   a ,  48   b ,  48   c ,  48   d ,  48   e  together, via connectors  73 , and maintain them in a perpendicular relationship one to another. 
     Now referring  FIGS.  9 A and  9 B , main deck  49 , and alternatively main deck  49  and secondary deck  51 , via their primary floor supporting elongated members  74 . are positioned over primary beam sections  48   a ,  48   b ,  48   c ,  48   d ,  48   e  that are releasably linked with secondary beam sections  72 , so that primary floor supporting elongated member  74  are spaced apart and parallel one to another, but also perpendicular to primary beam sections  48   b ,  48   d ,  48   e . Once base members  80  of all primary floor supporting elongated members  74  are releasably secured to primary beam sections ( 48   b ,  48   d ,  48   e ) and to secondary beam sections  72  using spaced apart pressure release connectors  90  ( FIGS.  9 B,  9 D ), main deck  49  and secondary deck  51  are strongly secured to the deck supporting structure, made of the rximary beam sections  48   b ,  48   c ,  48   d ,  48   e , the secondary beam sections  72  and the connectors  73 . Elongated wood strips  88  were prior inserted into top member longitudinal grooves  85  formed within top members  84  of primary and secondary floor supporting elongated members  76 ,  78 , so that first and second layers of flooring elements  78   a .  78   b  may be supported by primary and secondary floor stipporting eriongaled members  74 ,  76 . Indeed, flooring elements  78   a  such as, without limitation. wood planks, were fixedly or releasably (using nails. screws or the like) secured on a perpendicular manner on top of primary and secondary floor supporting elongated members  74 ,  76  by nailing or screwing wood planks onto elongated wood strips  88  introduced within longitudinal groove members  86  of primary and secondary floor supporting elongated members  74 ,  76 . Plywood sheets  78   b , for instance, may therefore be fixedely or releasably (using nails, screws or the like) secured on the wood planks. It is to be noted that a person skilled in the art to which the common tower assembly pertains would understand that flooring structure  14  may be assembled according to different steps order (1—providing the deck supporting structure using the landing beams; 2—mounting the ledger beams onto the landing beams; 3—fixing the flooring elements to the ledger beams vs. 1—providing the deck supporting structure using the landing beams; 2—fixing the flooring elements to the ledger beams; 3—mounting the ledger beams onto the landing beams). 
     Referring now to  FIGS.  10 A and  10 B , once flooring structure  14  (or part of a flooring structure  14 ) is assembled for one common tower floor, a pair of sliding members  54   a ,  54   b  is installed. on each column  12   a ,  12   b ,  12   c ,  12   d , by downwardly sliding longitudinal sliding surface or elongated portion  56  of sliding members  54   a ,  54   b  along longitudinal grooves  30   a ,  30   b  of column hollow section  24 , sliding through grooves  30   a ,  30   b  (3″ sliding adjustment for a main beam/sliding member assembly and for up to 6′ adjustment for a sliding member/column hollow section assembly). Therefore, when first arid second spring loaded pins  62 ,  64  of sliding members  54   a ,  54   b  are disengaged from longitudinally aligned column hollow section  24 , primary beam  48   a ,  48   b  are capable of horizontal displacement within grooves  30   a ,  30   b . One may turn them to lock sliding members  54   a ,  54   b  in place (one flooring is aligned with a corresponding building level). 
     Referring now more particularly to  FIGS.  7 A,  7 B,  12   . there is shown anchoring system  18  that is releasably eonnected to a primary beam section  48   c . Anchoring system  16  is configured to be anchored with the wail of a building structure arid comprises a set of main arms  92  that are independently pivotably and rdeasably connected to a first anchoring member  94  which is releasably mounted on primary beam section  48   c  Main arms  92  each comprises a plurality of main arm sections  96 . as well as an anchoring plate  98  pivotably extending from distal main arm sections  96  Anehoring plates  98  each define a set of apertures  100 , so that fasteners may be used to anchor anchoring plates  98  to he wall of the building structure, Anchoring system  18  further includes a set of secondary arms  102  that are independently pivotably and releasably connected to second and third anchoring members  104 .  106 , which are also releasably mounted on primary beam section  48   c , distant from first anehoring member  94 . Secondary arms  102  each comprises a plurality of secondary arm sections. as well as an anchoring plate  108  pivotably extending from secondary arms  102 . Anchoring plates  108  each defines a set of apertures  110 . so that fasteners may be used to anchor anchoring plates  108  to the wall of the building structure. The tower structure may therefore be anchored to the wall of the building with multiple configurations turnbuckles (possible displacement of the system in the x, y, and z axis) 
     As mentioned above and referring now to  FIGS.  1 ,  2 ,  11 A,  11 B,  11 C , and  12 . tower  10  comprises protection structures  20   a ,  20   b ,  20   c  (or  20 ) that are releasably mounted on each flooring structure  14   a ,  14   b ,  14   c  (and/or slidably connected to columns  12   a ,  12   b ,  12   c ,  12   d ) so as to upwardly extend from the flooring structures. As better shown in  FIGS.  11 A,  11 B,  11 C . each protection structure  20  comprises protection wails  112   a ,  112   b ,  112   c ,  112   d ,  112   e ,  112   f ,  112   g . Protection walls  112   a ,  112   b ,  112   c ,  112   d ,  112   e ,  112   f ,  112   g  each comprises a main frame  116  defining a plurality of horizontally oriented members  117  and a plurality of vertically oriented members  119 . First and second opposite edges of each wail adjacent a column may be adapted to slidably engage with spaced apart secondary longitudinal grooves  31   a ,  31   b ,  31   c ,  31   d  of column hollow sections  24  by downwardly sliding first and second opposite edges along longitudinal grooves  31   a ,  31   b ,  31   c ,  31   d . Other connection possibilities between tee protection walls and the columns and/or the flooring structure may be provided. For example, the protection wall may be releasably mounted directly on the flooring structure, so they upwardly extend from the flooring elements  78   a ,  73   b . Protection walls  112   a ,  112   b ,  112   c ,  112   d ,  112   e ,  112   f ,  112   g  each further comprises a protection that is connected to the horizontally and vertically oriented members  117 ,  119 . such as. without limitation, a protection mesh, glass or membrane (that is fixed to main frame  116 ) Also. as shown. main frame  116 , for some protection walls  1120 ,  112 o,  112   e  defines one Cr!&#39; more oroxmlings or doors  122   a ,  122   b ,  122   c ,  122   d ,  122   e ,  122   f  so that workers can have access to the building structure  125  via building access  123  ( FIG.  12   ). A sturdy protection may therefore protect the whole landing area, even around the extension deck. 
     Referring now more particularly to  FIG.  12   , according to its configuration. lower  10 , once erectediassembled, enable installation of up to six hoisting machines  124   a ,  124   b ,  124   c ,  124   d ,  124   e ,  124   f  (such as transport platform, construction elevator and the like) of the same type on a single common tower structure, where all hoisting machines are able to share a single access point  123  to building structure  125 , up to a 1500′ elevation. 
     According to its novel configuration and components, tower  10 , once assembled, brings an improved soletion for high-rise installation. Indeed, it enables multiple machines of the same type to be used together as part of the same installation. It further provides less openings on the building structure&#39;s walls. The design of the plurality of components, namely, the spaced apart columns (and the column sections), the vertically spaced apart flooring structures (and their components, namely the sliders, the landing beams, the ledger beams, etc.), the anchoring system, the protection structure as well as the plurality of connectors, leads to a faster installation of the tower trial requires less fasteners, thanks to, for example, the sliding members that releasably and sfidably connect each one of the flooring structures to the spaced apart columns  12   a ,  12   b ,  12   c ,  12   d , as well as to a faster installation Tower  10  may further be erected/assembled by a reduced number of workers and machinery (tool-less erection), thanks to the light weighted components, mostly made of aluminum extruded components/parts. Indeed, one 6-feet column hollow section weights about 130 pounds (in comparison, a mast section used for prior art towers re ay weight up to about 400-500 pounds for a 5-feet section) Safer use and installation of the tower itself is further provided, thanks to easy to install protection structures or meshes (that are configured to be sedately and releasably. or alternatively mechanically, connected to the columns and/or the flooring structures) and to the chain retaining pins teat prevent falling fasteners during and/or after instaliation of the tower onsite Flexibility of the tower design are further provided. 
     Referring now more particularly to  FIGS.  14 A- 14 G  and to  FIGS.  15 A- 15 C , there is shown a protection enclosure  130  that is designed to provide a safe election of common tower  10 . Indeed. protection enclosure  130  is configured to be releasably and slidebly supported by spaced apart columns  12   a ,  12   b ,  12   c ,  12   d , when erecting lower  10 , before all flooring structeres  14   a ,  14   b ,  14   c , etc. ( FIGS.  1  and  2   ) are releasably secured to spaced apart celernes  12   a ,  12   b ,  12   c ,  12   d , Protection enclosure  130  is capable of vertical displacement relatively to spaced apart columns  12   a ,  12   b ,  12   c ,  12   d  when supported by them, as it will be described below, such as to securely assemble one common to floor at a time. 
     Protection enclosure  130  comprises a protection enclosure main frame  132  which defines a plurality of access openings  146   a ,  146   b ,  148 ,  150  Indeed.  FIG.  14 A  shows access openings  146   a  and  146   b , where opening  146   a  relates to an upper building access and opening  146   b  relates to a lower building access. Furthermore,  FIG.  14 C  shows access opening  146   b  relates to a material access opening (such as to receive materials from hoisting equipment that will be needed to assemble common tower  10 ).  FIG.  14 C  also shows access opening  150 , which relates to a roll up door access for a hoist car. As it will be described in more details below. protection enclosure main frame  132  is configured to releasably and slidably engage with spaced apart longitudinal grooves  30   a ,  30   b ,  30   c ,  30   d  defined in column hollow sections  24 . 
     Protection enclosure  130  further comprises a roofing structure  134  which extends from protection enclosure main frame  132 , as well as a plurality of lifting assemblies  136  (usually a number of lifting assemblies that corresponds to the number of spaced apart coerrins is provided) Each lifting assembly  136  is operatively coupled to protection enclosure main frame  132  and further to a corresponding spaced apart column  12   a ,  12   b ,  12   c  or  12   d.    
     Referring now more particularly to  FIGS.  15 A,  15 B and  15 C , each lifting assembly  136  comprises an elongated jack  138  whith defines a first jack end  137  and a second jack end  139 . Assembly  136  further comprises an upper slider  140  connected to first jack end  137  and protection enclosure main frame  132  and further adapted to releasably and slidably engage with spaced apart longitudinal grooves  30   a ,  30   b ,  30   c ,  30   d . Assembly  136  further comprises a lower slider  142  connected to second jack end  139  and ferther adapted to releasably and slidably engage with spaced apart longitudmal grooves  30   a ,  30   b ,  30   c ,  30   d . It is to be mentioned that design of upper and lower sliders  140 ,  142  may look like design of above described slider  54 , as they all need to slidably interreact with same longitudinal grooves  30   a ,  30   b ,  30   c ,  30   d . Upper and lower sliders  140 ,  142  may therefore include a portion similar to longitudinal sliding surface  56  defined above. Upper and lower slider main bodies will however slightly differ from sliding member main body defined above as they need to interact with first and second jack ends  137 ,  139  of elongated jacks  138  or actuators instead of with main bears ends Therefore, according to its configuration, when prceection enclosure main frame  132  is supported by the spaced apart columns, via upper sliders  140 , protection enclosure main frame  132  is capable of vertical displacement between a protection enclosure lower position ( FIG.  15 A ) and a protection enclosure upper position ( FIG.  15 B ), as lifting assemblies  136  may extend from a compressed position ( FIG.  15 A ) to an extended position ( FIG.  15 B ). Such vertical displacement provides to securely assemble/disassemble common tower  10  one floor at a time, as it will be described in more details below. 
     Indeed,  FIGS.  16 A- 16 E  illustrate a method of erecting/assembling a common tower  10  using the common tower assembly described above, where protection enclosure  130  is releasably and slidably connected to the partly assembled spaced apart columns. 
     According to  FIG.  16 A , convey or hoist car  156 , slidably and operatively mounted on crane  164  adjacent common tower  10  being assembled. brings material on common tower flow  154  being constructed Hoist car enclosure  160  is provided above hoist car main frame  158  and configured to receive such material that will help in assembling common tower  10  Two already installed common tower floors, linked to building revels  162   a ,  162   b , are shown in  FIG.  16 A  (see common tower installed floor  152 ). 
     According to  FIG.  16 B , protection enclosure  130  is moved along spaced apart columns while providing lifting assemblies in their extended position (until bottom of protection enclosure man frame reaches flooring structure) so it protects the cwnmon tower flow being constructed Additional column hollow sections may be aligned with. and connected to, the already installed column hollow sections. 
     According to  FIG.  16 C , as require f, column hollow sections are aligned wen, and connected to. the already Installed column hollow sections. 
     Accordirie to  FIG.  160   , another dock supporting structure is releasably and slidably connected to the assembled column hollow sections forming the spaced apart columns, and further adjusted in height, so as it is possible to construct a new common tower floor 
     According to  FIG.  16 E , protection enclosure  130  is moved along spaced apart columns (until bottom of protection enclosure main frame reaches flowing structure) so it protects toe common tower floor being constructed. Additional column hollow sections may be aligned with, and connected to. the already installed column hollow sections Anchoring system may further be installed to engage with the building structure 
     Protection enclosure  130  therefore allows to quickly anci safely assembly/disassemble common tower  10 . as it frames the common tower floor that is constructed, prior moving up to provide safe construction of an adjacent common tower floor. 
     While preferred embodiments have been described above and illustrated in the accompanying drawings, it wilt be evident to those skilled in the art that modifications may be made therein without departing from the essence of this disclosure. Such modifications are considered as possible variants comprised in too scope of the disclosure.