Fence Line: All 10' Sections Job#: 2015-052
Chain Link Fence: Line Post Calculator
Wind Analysis Method Design Wind Loads - Solid Free Standing Walls ASCE 7-10 Sec. 29.4
Basic Wind Speed (ultimate) 135.00 MPH Risk Category I Structure
Topography Factor Kzt = 1.00 ASCE 7-10 Fig. 26.8-1
Directionality Factor Kd = 0.85 ASCE 7-10 Fig. 26.6-1
Gust Effect Factor G= 0.85 ASCE 7-10 Sec. 26.9.1
Fence Height h= 10.00 ft α= 7
Terrain Exp. Category B zg = 1200
Velocity Pressure Exp. Coefficient Kz = 0.575 ASCE 7-10 Fig. 29.4-1
Fence Length (min. straight run) B= 14.00 ft B/h = 1.4
Line Post Spacing S= 9.00 ft Cf = 1.43
Mesh Size 1.75 in Privacy Slats: NO
Wire Size (O.D) #9 gage 75
Velocity Pressure (strength) qz = 22.79 psf q z = .00256K z K zt K d V 2
qasd = 13.68 psf q asd = 0.6q z
Fence Trib. Area per Post (normal to wind) Atrib = 90.00 ft2
Force on Post (ASD) P= 1,496 lbs P = q asd GC f A trib (Solid Wall)
Wind Load Factor 1/Cf1 = 0.156
Adj. Force on Post (ASD) P' = 234 lbs P' = P/C f1 (Perf Wall)
Height of Resultant Force c= 5.50 ft ASCE 7-10 Fig. 29.4-1
Overturning Moment at Grade M= 1,286 ft-lbs
Steel Post Calculations:
Steel Post Type Group 1A Grade 30 ASTM F1083 Schedule 40 Steel Pipe Regular Grade (30,000 psi)
Post Diameter 2.875 in
Safety Factor 1.67 (1.5 - 1.67 typ.)
Section Modulus Sx = 1.064 in3 Yield Strength Fy = 30,000 psi
Allowable Moment Mallow = 1,593 ft-lbs OK
Specification: Use 2-7/8" Dia. Sch. 40 (30,000 PSI) Steel Line Posts @ 9' spacing
Footing Calculations: (Constrained Footing)
Footing Diameter b= 12.0 in
Allowable Lateral Soil Bearing Pressure (S) 200 psf/ft
3 4.25𝑀
𝑑=
Lateral Adj. Factors (per IBC Section 1806.3) 1.00 𝑆 ′𝑏
Adj. Allowable Lateral Soil Bearing Pressure (S') 200.0 psf/ft
IBC Eqn. 18-2
Depth of Constrained Footing d= 3.01 ft
Footing Calculations: (Non-Constrained Footing)
2.34𝑃
Allowable Lateral Soil Bearing Pressure @ 1/3 depth (S1) 293 psf 𝐴=
𝑆1 𝑏
A= 1.86
Depth of Non-Constrained Footing d= 4.40 ft
1�
4.36𝑐 2
𝑑 = 0.5𝐴 1 + 1 +
𝐴
Minimum footing depth per ATM F-567: d= 42.00 in IBC Eqn. 18-1
Minimum footing diameter (4x post dia.) bmin = 11.50 in OK ASTM F567
Specification: Use 12" Dia. X 42" Constrained Footing
Fence Calculator Rev. 1.0.1 - 11/20/2015 Copyright ® 2015 - Medeek Engineering Inc.
