Page 208 - Pressure Vessel Design Manual

186 Pressure Vessel Design Manual
Load Condition #1 Load Condition #2

-Z
*i
t t
'1

Full compression, no uplift, e 5 D/6 Partial compression, uplift, e > D/6

Figure 3-61. Load conditions on base plates.

Table 3-29 Table 3-30
Values of n' for Beams Average Properties of Concrete

Column Section n' Column Section n' Ult fg Allowable
Water 28-Day Compression, Allowable Coefficient,
W14x730-Wl4x 145 5.77 w10x45-w10x33 3.42 Contenmag Str (psi) F, (psi) 8, (Psi) n
w14 x 132 - w14 x 90 5.64 W8 x 67- W8 x 31 3.14
W14 x 82 - W14 x 61 4.43 W8 x 28- W8 x 24 2.77 7.5 2000 800 500 15
15
W14x53- W14x43 3.68 W6~25-W6~ 2.38 6.75 2500 1000 625 12
W12 x 336 - W12 x 65 4.77 W6 x 16 - W6 x 9 1.77 6 3000 1200 750 10
W12 x 58- W12 x 53 4.27 W5 x 19- W5 x 16 1.91 5 3750 1400 938 8
W12 x 50 - W12 x 40 3.61 W4x 13 1.53
wlox112-wlox49 3.92 Reprinted by permission of John Wiley & Sons, Inc.
-

By successive approximations, determine distance Y.
Coefficient:
Substitute KI3 into the following equation and assume
E an initial value of^ =% A as a first trial.
n = -2 (see Table 3-30)
E,
Y3 + K1Y2 + K2Y + K3 = 0
Dimension:
f = 0.5d+z Tension force:
By trial and error, determine Y, effective bearing length,
utilizing factors K1-3. e

Factors: T = (-)P
[H-i- ---+f
K1 =,(e+:)
Bearing pressure:

2(P + T)
f, = ___ < f:.
YB