SPColumn Example 6:

Verify the pure bending moment capacity of the section specified below:

Section dimensions:

bw=12 in

h= 28 in

Material properties:

f’c=4 ksi

εc= 0.003 in/in

β1= 0.85

Reinforcement parameters:

As= 9 in2

A's= 2 in2

fy=60 ksi

d (effective depth)= 26 in

εy= 0.002068 in/in

Result Comparison

Output Parameters	Description	spColumn	BDS	Percent Difference

Output Parameters	Description	spColumn	BDS	Percent Difference
β1		0.85	0.85	0%
εt		0.0033	0.0033	0%
c (in)	N.A. depth	12.31	12.31	0%
φ	Capacity reduction factor	0.7582	0.7615	0.43%
φMn (kip-ft)	Moment capacity	731.77	734.92	0.43%

Building Design Suite