Evening bulletin., 1911-06-09
, insufficient for the superimposcd

be insufficient for the superimposcd
load.
SAND. Sand shall be clean and
free from organic matter.
LIME. Lime shall be the fresh
burned quicklime or ordinary lime
Of commerce.
CEMENT The cement referred TO
is the standard Portland cement of
commerce, which, when tested. must
fll the requirements of Sec. 81 ICE
ment).
| CONCRETE. Concrete shall be
composed of Portland cement, sand,
and broken stone, or coarse gravel.
For the purpose OF filling in above
floor arches In fireproof buildings
clean boiler cinders may be used as
an aggregate In Cinder Concrete.
LUMBER. The lumber used for
building purposes shall be the native
or imported merchantable lumber of
commerce.
WROUGHT IRON. All wrought
iron shall be fibrous. tough, and due
title.
CAST IRON Cast iron shall be Of
good foundry mixture, producing
a clean, tough grey iron.
STEEL. Structural steel shall be
either the Bessemer or the OPEN
hearth steel, and shall conform to
Manufacturers Standard Specifica-
| tons.
TEST OF MATERIALS.
Section II. All structural mate
rials of whatever nature shall be sub
ject to test at the option Of the
Building Inspector to determine their
character and quality. by methods
prescribed by the American Society
of Testing Materials. No new class
of structural material shall be used
until the same has been tested and
found to fulfill the minimam condi-
tions necessary for good and safe
building
CALCULATION OF STRESSES.
Section 1S. The allowable working
stresses in materials, the strength of
parts, and combinations of materials
used, shall be determined in accord
ance with the rules and in the man
ner prescribed by standard modern
authorities on the strength of mate
rials. applied mechanics. and the best
engineering practice.
| SAPE LOADS ON SOILS.
Section 10. Good, sound, natural
earth shall not be subjected to a
greater loading than the following, In
tons. per square foot:
Gravel and coarse sand, -four;
Loan or fine sand Compaoted,
three;
Soft, wet sand, two.
In the construction of buildings on
soft, wet soil, piftng or other APP
proved methods of compressing the
soil shall bo used. When doubt
arises as to the safe sustaining power
of the ground upon which building
is to be erected, the Building In
spector may direct that the sustain
ing power of the soil shall be tested
by and at the expense of the owner,
In order that It's class may be def
initely determined.
FOUNDATION WALLS.
Section 90. (a) No foundation
walls in buildings of Glasses one
and two shall rest upon any filled
or made ground. The depths of foun-
dations of such buildings as do not
rest on solid coral or rock shall be
not less than the depths prescribed
in the following schedule:
In one-story buildings, not less
| than one foot below natural surface
of ground; In two and three-story
buildings, not less than two feet be-
low natural surface of ground; In
four-story buildings not less than
three feet below natural surface of
ground; in five and six-story build
ings not less than five feet below
natural surface of ground; in seven,
eight, nine and ten-story buildings not
less than six feet below natural sur
face of ground
Provided. however, that nothing in
this section contained shall prevent
the Building Inspector from reQuir-
ing a greater depth for foundations,
IL II is necessary for the stability of
said foundations and the structure
proposed to be erected thereon. The
width of the foundations of the sew
eral parts Of any building shall be
proportioned to the load to be carried,
as hereinafter specified,
% No course of brick footingH
shall project more than two inches
from the footing of wall above.
(c) Foundations shall be proper
toned to the actual loads they must
| sustain
STANDARD DEPTH OF FouNDA-