Evening bulletin. [volume] (Honolulu [Oahu, Hawaii]) 1895-1912, 1911-06-07


lIlgh mool In longion ...,.,., 2OOOO
Sicol In compression ,,,,,,piO,0OO
Steel Nv shear .H,t,,,,,,,,,,lO,1D
Concrete IN direct compress.
sion ,,t,.,,. .,.,,,rt,,, 800
Concrete cxlTomo nbro IN COM
preston ,,t,,,s,, ,ss,.,,, 200
Concrete In shear ,,,,,,r,,, 30
REINFORCED CONCRETE AgsUMp.
'TIONs.
section ~ ~ reinforced concrete
work shall b. designed IN accord
anco with best standard engineering
practice The following assumptions
may be- made
Whom bcamB and gIrdora nro made
mon0lllbic with the door slab. they
may be- computed 49, ~" beams Tho
width NJ slab which may be- consider
I'd part ~ The beam viii depend upon
Tho gbenrIng stresses, bul In no case
shall such total width exceed three
times The width NJ the beam
nEiNFORCED CONCRETE COLI
UMNS.
section a. The column rods shall
be- lied together by steel hoops gpac-
I'd moi hdow Than twelve G2J inches
apart,
Whom Tho unsupported longth NJ
concrete column exceeds twelve ngI
times W. least side Or diameter tho
allowable compression NJ tho concrete
SHAH be- taken ~ ave hundred 5000
pounds multiplied by the lonst slide
or diameter ~ The column In inches
hnd divided by Tho unsupported length
In feet
For exterior columns subject Ia CO.
centric londlng or bending Of m In
doiormlnnlo amount, tho above stress
Bhnll b. reduced NJ least twenty (2D
por cont Whom tho bending plrcsaoi
In n column can be- definitely dolorm.
lhoh, the combined bending aud direct
stresses shall not exceed I'VE hun.
drod lj0Oj pounds per square inch,
IN buildings over four 90 atorIoa
hlRl suniClcnl steel reinforcement
shalt DO used IA carry NJ least seven,
iyshyo G5l per cent of the dead load
" The lloorB ana roof ngurng ten
thousand 100000 pounda per square
Inch IN The steel, except when In
buildings NJ any number NJ stories the
columns nro large enough ~ that the
concrete alone viii carry The total
live ana dead loads with stress ~
moi over Ayo hundred 5000 pounds
per square inch the amount ~ steel
reinforcement may bo reduced 10 not
lom Than ono 30 per cent NJ tho
cross section area of The column
Proper provision shall be- made Tor
transmitting The stresses NJ the
hpllCoh In tho column rods
IN buildings over four 90 Hlonol
hlgh nll Hpllcon In the reinforcing
stool below the uppor three doors
shall be- made by means NJ rlyolod
connections, sleeve nuts, turnbuokloa,
or some approved positive connection
| COLUMNS FILLED WITH CON.
ClllFrE
section N Columns composed NJ
structural mool shape, lnlllcod lpRrth.
~ by nyollng nnd hlod In Rolidly
nnd surrounded by concrete, may be
computed ~ reinforced concrete o0l-
umnH sropl that tho allowable Hlrehh
IN The steel may be- Increased to twelve
thousand 10000 pounds por square
inch
CONCRETE COLUMN PROTECTION
section 40 The outer she'll NJ a
concrete nllod steel column shall be
considered only 49, u nroproof coyer-
lng
PROTECTION OF STEEL,
section bO rOr The purpose of ira
protection the reinforcing aiool shall
be- kept away from tho surface Of tho
concrete ono and one half uM) inchaa
In columna ono inch In beams AMI
glrdorn ANA V inch IN slabs
STEEL IN CONCRETE,
SECTION N All ronforcing steel
shall no auhlcol 10 loal by an approy.