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1

How do you find number of masonry blocks?

Linear feet x height x 1.125

2

How do you calculate for masonry cement?

Total block/100 x 3

3

How do you calculate for sand in masonry?

Bags of cement / 8

4

How do you calculate for water in masonry?

8 x # of bags of cement

5

How do you create a constant?

144 / L x H

6

How do you calculate PV?

L x W x H x # of structures

7

How do you calculate LF?

PV x 1.1 or 1.05

8

How do you calculate for LV?

LF x 1.5

9

How do you calculate bags of cement for concrete?

1/6 x LV

10

How do you calculate for sand for concrete?

2/6 x LV

11

How do you calculate for gravel for concrete?

3/6 x LV

12

How do you calculate for water?

8 x # of bags

13

How do you calculate for BF?

BF= T x W x L x # of pieces / 12 or 144


* if L = ft 12
* if L = in 144

14

How do you find BM?

1" or smaller, add 20%
2" or larger, add 10%

15

How do you find number of sheets needed for roof sheathing?

(TRL x TBL / 32) x 2

16

What is the nail formula for framing?

P = d/6 x BM/100

17

What is the nail formula for sheathing?

P = d/4 x BM/100

18

What is the formula for floor sheathing?

L x W/32 Round up x 2

19

What is the stringer formula?

H/7.5 = b (rounded off)
H/ b = ft and inches

20

How do you find rafter length?

Half length x run/rise (ex: 6/12)

A2 + B2 = C2

21

How do you find the number of truss/rafters?

# of roof members = building length/o.c. Spacing. Round up +1


*rafter spacing = 1.33
* truss spacing = 2

22

How do you estimate for roof sheathing?

TRL x TBL / 32 x 2 = sheathing

23

Formula for calc PV?

L x W x HT x # of structures

24

Find LF?

PV <5400 [PV x 1.1 = LF] PV >5400 [PV x 1.05 = LF]

25

Find LV?

LF x 1.5 = LV

26

Calculate total bags, tons of sand, gravel for concrete?

(LV / 1) x 6 = bags. (LV / 2) x 6 = tons of sand. (LV / 3) x 6 = gravel. bags x 8 = gal of water