Math Formulas Flashcards
1
Q
Square Feet
A
L x W
2
Q
Brick
A
SF x 7
3
Q
Block
A
SF x 1.125
4
Q
Square Yard
A
(L x W) / 9
5
Q
Cubic Yard
A
(L x W x D) / 27
6
Q
Rebar Quantity
A
= form - cover / O.C. spacing + 1
7
Q
Quantity stud
A
= L / O.C. spacing + 1
8
Q
Linear Feet
A
= end to end measurement
9
Q
Rough Opening
A
= Door size + 2 1/2”
10
Q
Header
A
= Door size + 5 1/2”
11
Q
Run
A
= half of the span
12
Q
Gable Ht
A
= Rise x Run / 12
13
Q
Common Rafter
A
= (Run O.H.) x Factor
14
Q
Roof Area
A
= (L+O.H) x (W + O.H.) x (factor)
