1. ESTIMATING STEEL FOR CONCRETE POURS

2. REBAR -Estimated by the pound or ton -Must know the size of steel bar needed -Must know linear feet needed -Bars may be obtained in lengths up to 60ft.

3. FORMULA WEIGHT PER FT=2.67(D squared) D=DIAMTER (USE CHART TO FIND D) THEN WEIGHT PER FT x NO. OF FEET NO. OF FT MULTIPLIED BY PRICE PER FOOT

4. Bar NumberBar Diameter (in)Bar Diameter (decimal)Weight 3 3/80.375 0.376 4 1/20.5 0.668 5 5/80.625 1.043 6 3/40.75 1.502 7 7/80.875 2.044 811 2.67 91 1/81.128 3.4 101 1/41.27 4.303 WEIGHT PER FT=2.67(D squared)

5. REBAR ESTIMATING EXAMPLE NO.7 BAR 160 linear feet -GO TO CHART -NO. 7 bar has a diameter of.875 -USE FORMULA -WEIGHT PER FT=2.67(Diameter Squared) -.875 Squared=.875 x.875 ANSWER=.77 -2.67 x.77 = 2.06 LBS PER FOOT -160 linear ft. x 2.06 LBS PER FOOT -329.6 LBS

6. WELDED WIRE FABRIC (WIRE MESH -COMES IN A SQUARE PATTERN -USED IN CONCRETE SLABS -MUST KNOW SF NEEDED -MUST KNOW SIZE NEEDED

7. WELDED WIRE FABRIC IS ESTIMATED IN WEIGHTS IN LBS. PER 100 SF -FIGURE Square Feet NEEDED -SF = L x W -SF X WEIGHT PER 100 SF (SEE CHART)

9. ESTIMATING EXAMPLE OF WELDED WIRE FABRIC -SIZE: 6 X 6 – W2.9/W2.9 (SEE CHART) -SF=600SF (20 x30) -FIND HOW MANY 100 SF -600SF DIVIDED BY 100 SF = 6 -WEIGHT PER 100 SF = 42 LB (SEE CHART) -6 X 42 LB = 252 LB -252 LB X PRICE PER LB

10. SAMPLE PROBLEM HANDOUTS FIGURE REBAR REBAR SIZE = 4 NO OF BARS = 2 BAR SIZE 4 DIAM =.5 (SEE CHART) FOMULA= 2.67 X (.5 SQUARED) = 2.67 X.25 =.67 LBS PER LF LINEAR FEET = 20 + 20 + 21 + 21 =82LF X 2 BARS =164LF.67 LBS X 164 LF = 109.88 LBS

11. SAMPLE PROBLEM HANDOUTS FIGURING WELDED WIRE FABRIC SIZE OF FABRIC: 6 X 6 – W1.4/W1.4 SQUARE FOOT OF AREA (L X W) : 43 X 43.5 = 1870.7 WEIGHT PER 100FT (SEE CHART): 21 LBS. NO. OF 100FT = 1872 DIVIDED BY 100 = 18.72 WEIGHT PER 100 FT X NO. OF 100 FT. = 21 X 18.72= 393 LBS

12. REVIEW -REBAR IS ESTIMATE BY THE LB OR TON -TO ESTIMATE REBAR THE SIZE AND LF OF THE BARS MUST BE KNOW -FORMULA TO ESTIMATE REBAR: WEIGHT PER FT. = 2.67 MULTIPLIED BY THE DIAMTER SQUARED -USE CHART TO FIND THE DIAMETER OF THE REBAR -WELDED WIRE FABRIC IS USED IN CONCRETE SLABS -TO ESTIMATE WWF THE SQUARE FOOTAGE AND SIZE OF THE FABRIC MUST BE KNOWN -WELDED WIRE FABRIC IS ESTIMATED BY THE WEIGHT PER 100 SF -USE CHART TO FIND THE WEIGHT PER 100SF