Evening bulletin. [volume] (Honolulu [Oahu, Hawaii]) 1895-1912, 1911-06-08
CONCRETE CONSTRUCTION.
PROPORTIONS AND MIXING OF
REINFORCED CONCRETE FOR
BUILDINGS.

REINFORCED CONCRETE FOR
BUILDINGS.
Section 30. Concrete for slabs
walls, beams and Orders shall not
be of a leaner mix than one part ce-
ment, two and one-half parts sand
and Ave parts stone. Concrete for
footlngs, foundations, sidewalks, etc,
shall not be of leaner mix than one
part of cement, three parts sand and
six parts of stone.
PERMITS AND DRAWINGS.
Section 80. Complete drawings,
| specifications and details of all rein
forced concrete construction, show
ing the size and position of all re-
inforcing members, shall be filed with
the Building Inspector before per-
init TO erect the same shall be issued
Computations and strain sheets shall
be submitted, when required.
, CEMENT, SAND AND MERITS.
Section 81. (a) Cement. only
Portland cement shall be used which
conforms to the Standard Specifica-
tons of the American Society for
Testing Materials.
All cement shall be tested In lots
of not more than one % car load,
and the Building Inspector may at
any time demand that certified copies
Of all test records be submitted to
him for examination.
The minimum requirements for
tensile strength for briquettes one
% inch square in section, shall be:
Neat Cement
"a hours in moist air .......2OO lbs.
Z days Zone day In air, six in
water) ACKNOWLEDGEMENTS. .bOO IDS.
2S days lone day in air,
twenty-seven in water) =. 900 lbs
One part cement, three parts
standard sand
Z days Zone day In air, six In
waterD NEUTRALITY-SUSPICIOUS.. .11b IDS.
2S days Zone day in air,
twenty-seven in water). $50 lbs.
Oh Sand. Sand used for concrete
shall be clean and free from refuse,
and shall contain not less than one
half its volume of crushed lava rock
sand.
Cc) Aggregate. The aggregate
shall consist of broken stone free
from dust. or clean gravel.
The Building Inspector may demand
that any material in question be test
ed at the expense of the owner, in
an approved testing laboratory, and
the results submitted to him to aid IN
forming his opinion as to the fitness
br unfitness of the material for the
purpose intended.
MATERIALS PROHIBITED.
Section 80. The following inerts
| shall be excluded In floor slab con-
structlon: Lime stone, boiler cinders'
plaster of paris. sulphate of lime, and
all similar unsuitable materials.
CEMENT BRICK.
Section 80. Brick made of sand
and Portland cement of the same d.
mansions as common brick, may be
substituted for common brick If the
use of such brick will In no way en-
danger the stability or safety of the
wall according to its exposure.
ARTIFICIAL STONE.
Section 40. Artificial stone made
OF Portland cement and incombusti-
BILE and fire and waterproof material
| may be used as substitute for any
natural stone, but no artificial stone
containing more than twelve (12) per
cent of lime or crushed lime stone
as an ingredient shall be used In a
Intel, or bearing part In any build
ing over three (3) stories high.
BUILDING BLOCKS.
Section Al. Cement or concrete
building blocks with hollow spaces
not exceeding one-third u-3 the
area of the block and having an an
| nulus OF uniform thickness, and not
exceeding nine t9) inches thigh nor
less than eight tS) inches on the
beds may he substituted for brick In
all buildings of the second class In
which the thickness and heights Of
walls las given in Table of thickness
of walls hereinbelow), up to four (D
stories, are prescribed. provided, that
an eight (S) inch block shall be deem
ed the equivalent of one u) brick IN
thickness of measure.
MEASURE OF THICKNESS.
Section AZ. The required thickness
Of all concrete walls or fireproohnt
or floor construction is for the full
thickness OF the material only, ex
elusive OF the plastering or floor bal
lasting.
| THICKNESS OF WALLS.
Section 43. Concrete walls withou
reinforcement shall be OF the full
thickness given In table for masonr!
walls hereinafter set out.