Maximum Post Centers

The maximum post centers for handrailing based on the maximum allowable bending moment of the pipe for each case. The maximum centers in inches (rounded to the smallest whole inch) are in the table below:

Design Load 1’’ Sch 40 1 1/4’’ Sch 40 1 1/2’’ Sch 40 1 1/2’’ Sch 80
35 1/2’’ High Handrail
265 lbf - ft 46 92 124 182
546 lbf - ft 22 45 60 88
1107 lbf - ft 11 22 29 43
39 3/8’’ High Handrail
265 lbf - ft 42 83 112 164
546 lbf - ft 20 40 74 80
1107 lbf - ft 10 20 26 39
43 1/4’’ High Handrail
265 lbf - ft 38 75 102 149
546 lbf - ft 18 36 49 72
1107 lbf - ft 9 18 24 35
49 1/4’’ High Handrail
265 lbf - ft 33 66 89 131
546 lbf - ft 16 32 43 64
1107 lbf - ft 8 16 21 31

lbf = pound force