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Flatbar Hardway Calculator



Enter These:
Thickness (T):
Inches
Height of Bar (H):
Inches
Inside Diameter (D):
Inches
Buckling / Failure Risk Chart*
Column Ratio Distortion Outcome
<12 Not Critical GOOD
12-16 BR <6 will have buckling/twist Maybe
16-18 CR 16 has upsetting if BR <8 Maybe
18-22 CR 20 has upsetting if BR <15 Maybe
22-24 CR 24 has upsetting if BR <24 Maybe
>25 Not suitable, cracking NOT LIKELY
*The chart is for reference only. The outcome is neither guaranteed by "GOOD" nor precluded by "NOT LIKELY." CMRP has rolled many jobs with Column Ratios over 25.