MEP-Technical Manual CDN 0408.qxd - Hambro
MEP-Technical Manual CDN 0408.qxd - Hambro
MEP-Technical Manual CDN 0408.qxd - Hambro
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IMPERIAL<br />
20<br />
JOIST DEPTH SELECTION TABLES<br />
Concrete: f’ c = 3 000 psi; density = 145 lb./ft. 3<br />
Joist spacing = 4’-2 5/8”<br />
NOTE: Plywood forms have to be slit in half for<br />
any depth.<br />
Slab thickness = 5”<br />
Residential Office Other Loading<br />
Building Building (LL=100 psf)<br />
Dead Load (psf) 90 90 90<br />
Live Load (psf) 40 50 100<br />
Total Load (psf) 130 140 190<br />
SPAN c/c<br />
30’-0”<br />
32’-0”<br />
34’-0”<br />
36’-0”<br />
38’-0”<br />
40’-0” *<br />
42’-0” *<br />
44’-0” *<br />
46’-0” *<br />
48’-0” *<br />
50’-0” *<br />
LH20 LH20 LH24<br />
min = LH16 min = LH16 min = LH20<br />
LH24 LH24 LH32<br />
min = LH16 min = LH16 min = LH20<br />
LH28 LH28 LH28<br />
min = LH20 min = LH20 min = LH24<br />
LH32 LH32 LH32<br />
min = LH20 min = LH20 min = LH24<br />
LH32 LH32 LH32<br />
min = LH24 min = LH24 min = LH24<br />
LH32 LH32 LH32<br />
min = LH24 min = LH24 min = LH28<br />
LH32 LH32 LH32<br />
min = LH24 min = LH24 min = LH32<br />
LH36 LH36 LH36<br />
min = LH24 min = LH24 min = LH32<br />
LH36 LH36 LH36<br />
min = LH24 min = LH24 min = LH36<br />
LH36 LH36<br />
min = LH28 min = LH28<br />
LH36 LH36<br />
min = LH28 min = LH28<br />
* Permanent line of cross bridging shall be installed at mid-span.<br />
LHXXX<br />
min = LHXXX<br />
: Optimal LH Series Joist Depth (in.)<br />
: Minimum Depth (in.) Allowed