Improvements in Girders and Beams for use in Building Purposes Generally.
Year: 1891

page_text: Date of Application, 24th Oct., 1891
Complete Specification Left, 22nd July, 1892-Accepted, 27th Aug., 1892
PROVISIONAL SPECIFICATION.
Improvements in Girders and Beams for use in Building
Purposes Generally.
I, WILLIAM ORR of 109 Saint Vincent Street, Glasgow in the County of
Lanark, Merchant, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in girders for carrying fire proof and
other floors and roofs and in constructing the walls and other parts of buildings
and it has for its object to produce a girder cheaper in construction lighter and
more easily transportable than the rolled girders and beams ordinarily in use.
Under the invention the girder or beam consists of a top and bottom member
each composed of a tube of incomplete section that is to say it may have a slot
extending throughout its entire length the tubes being braced together by cross ties
having flattened or spread ends which are inserted through the slots and then
turned round so as to bring the flattened or spread parts transverse to the length
of the slots or instead of making continuous slots throughout the lengths of the
tubes slots may be cut at such distances apart as it is desired to insert the cross ties.
In either case the structure may be further strengthened by diagonal braces
extending between the cross ties and bolted rivetted or otherwise fastened thereto
or secured in position by spreading or flattening their ends and inserting and
turning them in the slots.
Under a modification the girder or beam instead of consisting of two tubular
members tied together may be composed of three four or more such members
similarly tied and in cases where it is desired after the structure is completed the
tubes may be filled with concrete or other fire resisting material.
When a girder or beam constructed in accordance with the invention is used to
carry fire proof floors or roofs the girders are joined together by arched or buckled
metallic sheets which have their ends bent to enter the longitudinal slots these
plates or sheets being secured in position in the act of turning or twisting the
cross tie or by separate fastenings and on the said arched sheets the fire proof
floor or roof is laid. The same arrangement may also be applied to the construction
of fire proof walls and in that case flat or arched sheets bending towards or from
each other are or may be connected to both tubular members of the girder the
fire proof material being filled in between.
Dated this Twenty-third day of October 1891.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Girders and Beams for use in Building
Purposes Generally.
I, WILLIAM ORR of 109 Saint Vincent Street, Glasgow, in the County of
Lanark, Merchant, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :-
This invention relates to improvements in girders for carrying fire proof and
other floors and roofs and in constructing the walls and other parts of buildings
and it has for its object to produce a girder cheaper in construction lighter and
more easily transportable than the rolled girders and beams ordinarily in use.

page_text: Under the invention the girder or beam consists, as seen in transverse section
at Figure 1 and in part longitudinal section at Figure 2 of the accompanying
drawings, of a top and bottom member each composed of a tube A, of incomplete
section, that is to say, each tube has a slot extending throughout its entire length
the tubes being braced together by cross ties B having flattened or spread ends C
which are inserted through the slots and then turned round so as to bring the
flattened or spread parts transverse to the length of the slots and cause them to
fill a section of the interior space or instead of making continuous slots throughout
the lengths of the tubes slots may be cut as seen at D Figure 3 at such distances
apart as it is desired to insert the cross ties B. In either case the structure may
be further strengthened as shown by Figure 4 by diagonal braces E extending
between the cross ties B and bolted, rivetted or otherwise fastened thereto.
Under a modification illustrated in transverse section at Figure 5 and in part
longitudinal section at Figure 6 the girder or beam instead of consisting of two
tubular members tied together may be composed of three, four or more such
members similarly tied and in cases where it is desired after the structure is
completed the interior of the tubes may be filled with concrete or other fire
resisting material.
When a girder or beam constructed in accordance with the invention is used to
carry fire-proof floors or roofs the girders are as shewn by Figure 7 joined
together by arched or buckled metallic sheets F which have their ends bent to
enter the longitudinal slots-these plates or sheets being secured in position in the
act of turning or twisting the cross ties B, or by separate fastenings, or as shewn
by Figure 8 the edges of each sheet F may be rested or supported upon the lower
tubular member A of the girder or beam, recesses being made in the edges of the
sheet at distances apart corresponding to the distances between the cross ties B.
The fire proof floor or roof G is laid on the arched sheets.
The same arrangement may also be applied to the construction of fire proof walls
and in that case flat or arched sheets bending towards or from each other are or
may be connected to both tubular members of the girder the fire proof material
being filled in between.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
A girder or beam constructed substantially as herein before described with
reference to the several modifications illustrated on the sheet of drawings hereunto
annexed.
Dated this Twenty-first day of July 1892.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.