1073 Atlantic Blvd002 I
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KENCO SIGNS & AWNING
PROJECT: ATLANTIC SELF STORAGE DATE: 01-28-98
'
BY: LEB
DESIGN LOAD: 110 MPH WIND LOAD 27 PSF @ < 20'
CRITERIA SBC CHAPTER 1606 1994
MATERIAL SPECIFICATIONS: STEEL POST AND BRACING
Fb = Fc = 24,000 psi
CONCRETE: 2,500 psi MIN @ 7 DAYS
ck MAX BENDING MOMENT IN STEEL POST
Mmax = AREA OF SIGN x Cf x W.L. x CENTROID
AREA CENTROID TOTAL
1. = 14.00'x 8.0' = 112.0 SF x 15.00 ' = 1,680 ft3
2. = 4.00'x 11 .01 = 44.0 SF x 5.50 ' = 242 ft3
TOTAL = 1,922 ft3
W.L. = 27 PSF
Mmax = 1,922 SF x 27 #/SF = 51,894 FT-#; 2 poles 25,947 FT-#
SOLVE FOR SECTION MODULUS (Sx) REQUIRED
Mmax = Fb x Sx = 2,000 x Sx
12
Sx = 25.947 FT-# = 12.98 in3
2,000
USE 2- 8" dia STD WEIGHT STEEL POST Sx = 16.80 in3
ck FOOTING REQUIRED ENCASE EACH POLE IN CONCRETE BASE
DETERMINE DEPTH OF BURY; Mmax = 25,947 FT-#; Sa 3,000 PSF
FACTOR OF SAFETY = Fs = 1 .25;
B = WIDTH OR DIA
TABLE: FOR VALUES OF B FIND D = {1.25x 4.25x Mmax/Sa x B}1/2
B D
3 ' 4 ' - 0"
4' 3 ' - 5" USE 4'x 4 'x 3' - 7 DEEP
5 ' 3 ' - O"
CERTI 1/28/98
LAW NCE BENNETT, P.E.
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