Weight of Metal per Sqft.

Weights of Metal
Type of steel	approx lbs. per Sq ft	4 x 8 weight in lbs.	4 x 10 weight in lbs	5 x 10 weight in lbs	5 x 12 weight in lbs	75×240 weight in lbs
16 gauge HR	2.5	80.0	100.0	125.0	150.0
11 gauge HR	5.0	160.0	200.0	250.0	300.0
7 gauge HR	7.5	240.0	300.0	375.0	450.0
1/4 plate HR	10.2	327.0	408.8	511.0	613.2
5/16 plate HR	12.8	408.0	510.0	637.5	765.0
3/8 plate HR	15.3	490.2	612.8	766.0	919.2
7/16 plate HR	17.9	571.2	714.0	892.5	1071.0
1/2 plate HRPO	20.5	656.0	820.0	1025.0	1230.0
3/4 plate HRPO	30.6	980.2	1225.2	1531.5	1837.8
1″ plate mild steel	40.8	1306.9	1633.6	2042.0	2450.4
16 gauge 4130 plate	2.6	82.2	102.8	128.5	154.2
3/16″ chrome moly	9.6					1200.0
1/4″ chrome moly	10.4					1300.0
3/8″ chrome moly	15.6					1950.0
1/2″ chrome moly	21.2					2650.0

			Weight per foot	Weight per length
1/2 x 4 CF flat bar x 10/12 rl			7.0	83.9
1/4 CF rods x 20′ (per 100 rods)			0.2	334.0
1 1/2″ CF square bar x 12′ rl			7.7	92.4
1/2″ CF square bar x 12′			0.9	10.2
1/4″ x 2 CF flat bar x 20′			1.7	34.0
3/8″ x 1 CF flat bar x 20′			1.3	25.6
3/8″ x 2 CF flat bar x 20′			2.6	51.0
1/4″ 4130 rods 12′ rl			0.2	2.0
1/2″ 4130 rods 12′ rl			0.7	8.0
1″ Schedule 40 T304 pipe x 20′			1.7	34.0
C6 x 8.2 channel x 20′			8.2	164.0
3/4″ Schedule 80 pipe x 21′			1.0	21.0

Remember: square footage is figured length (in ft) x width (in ft) [4 ft x 10 ft sheet of metal is 40 sq ft]. To figure square footage from inches - length x width / 144 [ 48 inches x 120 inches / 144 = 40 sq ft.]