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Section 2
2-37
()
22
22
*29000
250.5999
120
..
2.12
5.17
ez
E
F
FS KLr
ππ
===
⎛⎞
⎜⎟
⎝⎠
From table 10-36A, C
mz
= 0.85
Equation 10-42
3.26 0.85* 20.299
0 1.122
3.26
13.58
1- 19.8
1
1
250.599
'
'
my by
amxbz
a
a
a
bz
by
ez
ey
Cf
fCf
F
f
f
F
F
F
F
++ =+ +=
⎛⎞⎛⎞ ⎛ ⎞
−
⎜⎟
−
⎜⎟⎜⎟
⎜⎟
⎝⎠
⎝⎠
⎝⎠
For the end section, Equation 10-43
3.26 20.299
0 1.217
0.472 0.472 * 36 19.8
by
abz
ybzby
f
ff
FF F
++= + +=
The value calculated by STAAD is 1.218
Member 2, Size W 12X26, L = 5 ft., a = 7.65 in
2
, Sz = 33.4 in
3
From observation Load case 1 will govern, Forces at the midspan
are
Fx = 8.71 kip (compression), Mz = 56.5 k-ft
Allowable Stress Calculation:
From Table 10.32.1A,