Evening star. [volume] (Washington, D.C.) 1854-1972, 1915-07-12
OFFICIAL NOTICES.

COMMISSIONERS OFTHE DISTRICrOF COIUM-
the building Rernls Of the District Of Column
bia be. and the same are hereby. amended as io'-
lows, such amendments to become effective Az Az,
first paragraph of Section IS to read as follows:
Section IS. The walls of every building within
stone. concrete, hollow building blocks. or -
combination of these materials. Hollow hnlia-
may be used for all walls except party walls.
Hollow building blocks OF terra cctfa shall De
sound. hard and we'll burned and shall develop
gross area Of not less than 40 pounds wnen
tested with the cells placed vertically and ~ 80
allowable working stress on such blocks tested
with cells placed vertically shall not exceed 10
the cells horizontal shall not exceed 30 pounds
per square inch. Hollow tile building blocks
ness Of not less than x Of one inch The total
net of shells and webs shall be not less
than % per cent Of the gross area: concrete nr
minimum thickness OF shells and webs OF not
less than inches. Hollow building blocks OF
concrete shall be made of Portland cement and
suitable aggregate in such proportions as TO Dc
velop at the age Of g days an ultimate crush
less than 500 pounds when tested with the cells
placed vertically. and 300 pounds when tested
able working stress on such blocks tested with
the cells placed vertically shall not exceed 80
pounds per square inch gross area. and when
tested with coils placed horizontally shall not
exceed 20 pounds per square inch gross area All
sorption. The absorption of hollow building
blocks Of terra Gotta to be used for bearing or
enclosing walls shall not exceed Il per cent In
As hours as an average. nor more than /! per
cent in any case. ILntes. Hollow blocks when
rrsed to form lIntels. which are not keyed arches:
shall be. reinforced with. steel rods and be hlled
signed with the nn and
other requirements for reinforced concrete as re-
S"sed in Section S. HSSw building ,s SSSk
building blocks are decreased in thickness, the
blocks in the top course of the thicker wall shall
slabs of hard burned terra Gotta or concrete at
least one inch In thickness. Terra Gotta or con
shall be placed under all floor beams and eirders
to properly distribute the loads. Veneering.
%ss Be- OF eG's on
veneered with brick, architectural terra Gotta,
or stone. Or covered on the exposed surface with
at least y Of an inch of Portland cement stucco
neered the facing shall either be bonded to the
Courses or ' attached to the backing With sp.
proved metal wall ties bedded in the mortar
: feet on centers. vertically or hori.ontaIiy
When metal ties are used the veneering shall
nes be Of sss %a s the ws. hollow
over forty t4O) feet in height except in buildings
hollow building blocks shall 30 laid up in ce-
ment mortar no poorer than one part cement
Thickness Of wall. All bearing and e exterior
walls of tile built within the fire limits shall!
conform IN nelSnt ana thickness TO the required
dimensions for solid brick walls for the re-
spective classes or purposes. Outside the fire
limits hollow building blocks for walls Of build
ings not more than two stories In height and
not more than IS feet in height shall be not
less than 10 inches in thickness for the cellar
or foundation walls, and not less than inches
In thickness for the first and second stories above
the foundation; Provided, That outbudngs.
such as stables or garages not more than one
story in height and not exceeding 900 square
feet in area may be built with walls of 4
Inches in thickness; The materials used in the
vi n hoI hlItld hlnrk ntoido tno 0ra
limits shall conform to the requirements for
quality Of blocks. character Of construction and
physical properties that apply within the fire
limits. Also amend Section co. by striking out
the words structural terra Gotta shall not be
permitted for external walls within the IRE
limits' in the last sentence Of the first para
graph Amend the second paragraph Of Section
per cent In the 9th line Of this paragraph and
By emitting the words such tile walls shall be
construed to be In lieu Of frame construction
and shall conform with the regulations govern
ing such" in the last sentence Of said para
graph. o. P. NEWMAN, LOUIS BROWNLOW
q. W. KUTZ, Commissioners, D. @.