# SLABS, COLUMNS & FOOTINGS

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1 SLABS, COLUMNS & FOOTINGS Multiply the height of your column by the number that corresponds to the diameter to determine the cubic yards needed. Column CY = 0.78 x A x B 7 B A Diameter CY Diameter CY Diameter CY 8".0 0".08 ".07 9".06 ".089 ".0 0".00 ".097 ". ".0 ".07 ".8 ".09 ".6 6".6 ".0 ".6 7".76 ".00 6".7 8".9 ".0 7".7 9".07 6".0 8".8 0". 7".08 9".70 ".0 8".06 0".8 ".6 9".07 ".9 ".7 Table for Estimating Concrete This table shows the amount of concrete required, in cubic yards, for foot of height of cylinders of various diameters. Concrete for Footing CY's per Linear Foot Width of Footing (in.) " " 8" " Depth of Footing (inches) SLABS, COLUMNS & FOOTINGS Using the Formula CY = L x W x D 7 Add the total linear feet (LF) of footings. Multiply the LF by the width of the footings. Multiply area by depth of the footings. Divide the cubic feet by 7 to find the cubic yards. Using the Table Identify the factor in the table based on the depth and width of your footing. Multiply the LF by the factor to determine how many cubic yards of concrete you need. CONCRETE SLUMP

2 CONCRETE SLUMP Determine the Slump of Concrete 6 Take a sampling of concrete and place it into the cone intended for this purpose. Place the concrete into the cone in three equal layers and rod each layer times to consolidate the concrete. Ten lbs. of water per cubic yard of concrete will increase the slump by approximately. A gallon of water weighs 8. lbs. Empty the concrete from the cone. Place the cone to the side of the concrete. After the concrete has settled, place a level across the top of the cone. Measure from the bottom of the level to the top of the concrete the measurement is the "Slump of the Concrete." Increase the Slump of Concrete Total Cubic Yards x Increase (inches) How many gallons of water should be added to cubic yards of concrete if the slump needs to be increased by.? Multiply the total cubic yards of concrete by the number of inches the slump is increased. x. = 8 Multiply the product of Step by 0. 8 x 0 = 80 lbs. of water Divide the total pounds of water (product from Step ) needed by =.60 gallons of water

3 REBAR Rebar Weight Weight = LF of Bar x Weight per LF Rebar Weight Rod Size (Diameter) Rod Number ¼.67 /8.76 ½.668 /8.0 ¾ 6.0 7/ Water to Cement Ratio Water (lbs.) Ratio = Cement in mix (lbs.) REBAR Calculate the total weight of rebar if you are installing pieces of # rebar that are in length. Weight of # bar is.0 lbs. per LF Calculate total LF: x = 9 9 x.0 lbs. = 06.6 lbs. Weight (Pounds per LF) Calculate the water to cement ratio in a batch of concrete if cubic yard has gallons of water and pounds of cement. Convert gal. of water into lbs. x 8. = 8.6 lbs. Divide water by the pounds of cement. 8.6 = 0.0 Note: A gallon of water weighs 8. lbs. Rebar Lap Lap = Bar Diameter x Specified Lap Calculate the overlap for # bar with a specified bar lap of d. Diameter is /8 or.6 Determine bar lap = x.6 =.6 Note: Specified to be overlapped -/8" Overlap of Rebar Convert Gallons of Water into Pounds Pounds = Gallons of Water x 8. Calculate the pounds of water in gallons of water. Gallons of water x 8.. x 8. = 7.8 pounds Note: A gallon of water weighs 8. lbs. Convert Pounds of Water into Gallons Gallons = Pounds of Water 8. Calculate the number of gallons in pounds of water. Pounds of water 8.. divided by 8. = 7.97 gallons Note: A gallon of water weighs 8. lbs. ESTIMATING BRICK

4 ESTIMATING BRICK Brick Multiplier: H x L of brick* *Must add mortar to one side and joint first Calculating Quantity of Brick Brick Quantity: Area* x Multiplier *Deduct for openings 6 Add mortar to one side and one joint to face dimensions of the brick. Multiply the Height of the brick by the Length of the brick to determine face area in square inches (or use the table). Divide square inches by the face area of the brick. (This is the multiplier how many brick you will need per square foot.) Calculate the area of the space for installing brick. Deduct the square feet of the openings. Multiply the area by the brick multiplier (can be found on the next page). Add % to 0% for waste. Using the Table to Calculate Brick Quantity Brick Size Mortar Joint Type Height Length Width /" /8" /" /8" /" Common ¼ 8 ¾ Large St /8 ¾ ¾ Small St ¼ 8 ¾ Jumbo /8 ½ ½ Norman ¾ 8 ¾ Roman ¼ ½ ¾ Calculate the quantity of brick to be installed on 000 square feet. You are installing a Common Brick with a ¼ mortar joint. Find the number that corresponds to your mortar joint and brick type. The number is 7. This is the number of bricks needed to cover one square foot. Multiply this number by the area for which you will be installing brick. 7 x 000 = 8,000 NOTE: Don't forget to deduct for openings and factor in waste.

5 ESTIMATING MORTAR, CEMENT & SAND Joint Thickness (inches) Quantity(CF) of mortar required to lay 000 Bricks Thickness of the Wall in Inches " 8" " 6" 0" " / / / / / / / What CF of mortar is needed to install 7600 bricks? Wall thickness is and the mortar joint is /8". Identify the joint thickness. Go to /8" Identify the thickness of your wall. Follow across to " thickness Identify the multiplier that corresponds with Step & Step. Multiplier is.9 Divide the total number of bricks you are installing by = 7.6 Use the multiplier from Step to multiply by the number from Step. This is the CF of mortar..9 x 7.6 =.0 CF of mortar Calculate Masonry Cement Cement = CF of Mortar x 0. Calculate Pounds of Sand Sand = CF of Mortar x 00 Calculate the number of bags of cement needed to install,000 bricks if the wall thickness is with /8 mortar joint. Calculate the pounds of sand needed to install,000 bricks if the wall thickness is with /8 mortar joint. Determine the Cubic Feet of mortar needed based on the table., x 8.7 = 00 Determine the Cubic Feet of mortar needed based on the table., x 8.7 = 00 Multiply the CF of mortar needed by x 0. = 00 bags Multiply the CF of mortar needed by x 00 = 0,000 pounds ESTIMATING MORTAR, CEMENT & SAND ESTIMATING BLOCK

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