Laying Out the Job
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The Advance system saves you time and money by allowing you to make a layout in advance. Because the steel backing bars butt each other exactly, precise dimensions are maintained. To determine the number of panels, fractions, tie wires and accessories, consult your blueprint or make a sketch yourself. Start at a corner to figure the size of the corner fractions needed. When using the standard 1" x 1" outside corner, just add the wall thickness to the inside corner dimension and you have the size of the fraction needed. For example, if you're pouring an 8" wall and your using 4" x 4" inside corners, you'll need a pair of 12" (8 + 4") fractions for the outside corner. This works because the 1" x 1" outside corner actually adds no length to the run. However, when using 2" x 2" outside corners, you must take the 2" length into account. So an 8" wall with 2" x 2" outside corners and 4" x 4" inside corners would require a 10" fraction (8" + 4" - 2").
There are three steps in calculating the number of panels and fractions in a run.
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Subtract the sum of the corner fractions on the outside wall from overall length of the run.
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Divide this result by 2' to obtain the number of panels required. The third remainder is the size of the fraction needed to complete the wall.
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Double these figures to obtain the requirements for both sides.
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For example, when setting a 12" wall 29'0" long with 4" x 4" corners, what combination of forms would be needed? First determine the corner fractions and subtract them from the length of the run.
12" wall + (4" x 4") corner = 16": fraction
16" x 2 = 32" or 2'8"
29'8" - 2'8" = 27'0"
Second, divide 27'0" by 2'.
27'0" ö 2 = 13, with a remainder of 1'0"
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So you will need 13 panels and a fraction of 1'0" (or 12") for one side of the wall. Finally, double these figures to get your requirements for both sides of the wall. You will need 26 panels, two 12" fractions and four 16" fractions for both corners. A simple sketch will show the accuracy of this method.
Determining the fractions needed at a "T" is also easy to calculate. Just take the cross-wall thickness and add the sum of the inside corner dimensions to determine the outside wall fractions needed. For a 12" wall with 4" x 4" corners, the fractions needed would be 4" + 12"+ 4" = 20".