Alexandria gazette. [volume] (Alexandria, D.C.) 1834-1974, 1896-05-20
Business, Manufacturing, and Public Buildings

13. When the upper stories Of any business,
manufacturing or public building are to be
used for dwelling purposes only, the thick
ness of the walls Of such upper stories may
conform to the thickness of similar stories
designated in the tables for the walls of
dwelling houses.
IA. Whenever any builder, owner or con-
tractor wishes 10 construct or erect any lid
ing to q greater height than above specified
the increased thick ness of tho walls shall be
determined by the Inspector of Buildings.
10. A full mansard roof shall be considered
full story.
16. No existing party wall may be used for
the support OF any building hereafter to be
erected unless the size and construction OF
the said party wall conforms to, or ID altered
TO conform to, the requirements of this ordi-
nance for party walls. Such alteration is to
be done at the expense of the person or per-
SONS building.
II. The use of any wall adjoining lot but
not on the same rs party wall. may be q
matter of agreement between the parties in.
terested, but in such cases the size and con-
struction of the wall must conform to the re-
ouirements Of this ordinance for party walls.
If such wall is not in accordance with the re-.
ouirements called for by this ordinance it
must be made so, if used, at the expense OF
the person or persons bull ling.
Is. When any existing walls, intended to
be used as party walls are to be altered or ad
ded to, to conform to the thickness required
by this ordinance for party walls, no addition
of less than nine inches thick, built along
side. will be considered ss fulfilling such re-
quirements.
10. Division walls, when used as bearing
walls, shall not be less than tWo-thirds 2a)
the thickness Of party or external walls of the
same height, but never less than nine (9)
inches.
When used only as partition wells may be
only nine (9) inches thick if less than forty
(4O) feet in height.
20. Party walls shall be brought up at least
fifteen (15) inches above the roof covering at
every part of the roof.
u. The height of any story shall mean the
distance from the top of floor beams of one
1oor to the top of floor beams or joists above.
%. The height of no story Of any dwelling
house shall exceed fifteen (15) times. nor any
business, manufacturing or public building
twelve (12) times the thickness prescribed
for the walls of such story, except the thick.
ness of walls be increased four az inches for
each additional ten (10) feet or fraction
thereof of the additional height.
%. Where girders or trusses are used for
the support of the floors or roofs bearing i'm
medately on such higher wall the additional
material required by such thickness may be
placed in the form of pilasters or buttressea.
"a In all buildings over 80 feet in width
not having either brick bearing division walls
or girders supported by columns running
length sise of the buildings, the external
bearing walls shall be increased in thickness
by an amount equal to four a. inches IN
thickness for every additional thirty feet or
part thereof of the additional width of the
building
The additional amount of material above
specified for external bearing walls shall be
used IN pilasters or buttresses if the weight of
the subincumbent floor or roof is carried to
the said walls on girders or trusses, provided
tie curtain walls between said pilasters or
buttre sses in no case less than nine 81 inche 8
thick.
In all walls the same amount Of material
may be used in piers or buttresses.
25. II the recesses or openings in party ex-
ternal or division walls, the samo being bear
ing walls, exceed fifty (50) per cent. of the
entire area of the walls in the story in which
they are made, the thickness OF said walls
shall be four az inches greater than set forth
in the tables.
26. Recesses and chases may be made in
walls provided that in party and external
walls the backs of recesses or chsses shall not
be less than nine (9) inches in thickness.
Recesses or chases over two ~ feet in width
must be arched, the crown of the arch bsing
at least eighteen (1S) inches below the bot.
tom of the floor beams above
Recesses and chases shall be so placed as
not to unduly weaken the wall.
27. No continuous vertical recess, of more
than four (4) inche, in depth, shall be made
in any thirteen (l3) inch party or exterior
wall, and no recess of any kind shall be made
in any nine (9) inch party or exterior wall.
2S. Openings for doors and windows shall
have good and sufficient arches of stone or
brick, well built and keyed with good and
sufficient abutments, Ut lintels of stone, iron,
OF wood. but where wood lintels are used dead
arches shall be turned over them.
20. No Intel shall have a bearing of less
than four and one-half (41a) inches at each
end, and Oh the inslde Of openings in which
the arches or lintels are less than the thick
ness of the wall supplementary timber lintels
may be used if dead arches are turned over
the same. r5
No timber Intel may be used to span any
opening greater than ten feet upon which a
wall rests, but such openings must be spanned
xvith arches of cut stone or hard brick, OF