Deflection Calculator for Square Tubing

ends free
ends fixed

tube size in inches            
decimal gauge                  
length of beam in inches  
center load in pounds      

type = steel   ends = free
est. weight = 1.7105# per foot
OD = 2"  ID = 1.87"
Moment of Inertia = 0.3143

Deflection = 0.9873"

Important Caveats:

This calculator may give you a rough idea of the deflection of metal tubing, but it's not accurate enough to do any more than estimate it. If the deflection is large enough to permanently bend the tube, then all bets are off.

The steel weights are tweaked for mechanical tubing, and will be less accurate for structural tubing.

The moduli of elasticity used are 29,700,000 psi for steel and 10,000,000 psi for aluminum.

Use at your own risk.     Or you'll be sorry.

formulas and data gleaned from:


source code