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SOC > Formulas > Flashcards

Formulas Flashcards

1
Q

How do you find number of masonry blocks?

A

Linear feet x height x 1.125

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2
Q

How do you calculate for masonry cement?

A

Total block/100 x 3

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3
Q

How do you calculate for sand in masonry?

A

Bags of cement / 8

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4
Q

How do you calculate for water in masonry?

A

8 x # of bags of cement

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5
Q

How do you create a constant?

A

144 / L x H

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6
Q

How do you calculate PV?

A

L x W x H x # of structures

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7
Q

How do you calculate LF?

A

PV x 1.1 or 1.05

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8
Q

How do you calculate for LV?

A

LF x 1.5

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9
Q

How do you calculate bags of cement for concrete?

A

1/6 x LV

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10
Q

How do you calculate for sand for concrete?

A

2/6 x LV

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11
Q

How do you calculate for gravel for concrete?

A

3/6 x LV

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12
Q

How do you calculate for water?

A

8 x # of bags

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13
Q

How do you calculate for BF?

A

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

  • if L = ft 12
  • if L = in 144
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14
Q

How do you find BM?

A

1” or smaller, add 20%

2” or larger, add 10%

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15
Q

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

A

(TRL x TBL / 32) x 2

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16
Q

What is the nail formula for framing?

A

P = d/6 x BM/100

17
Q

What is the nail formula for sheathing?

A

P = d/4 x BM/100

18
Q

What is the formula for floor sheathing?

A

L x W/32 Round up x 2

19
Q

What is the stringer formula?

A

H/7.5 = b (rounded off)

H/ b = ft and inches

20
Q

How do you find rafter length?

A

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

A2 + B2 = C2

21
Q

How do you find the number of truss/rafters?

A

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

  • rafter spacing = 1.33
  • truss spacing = 2
22
Q

How do you estimate for roof sheathing?

A

TRL x TBL / 32 x 2 = sheathing

23
Q

Formula for calc PV?

A

L x W x HT x # of structures

24
Q

Find LF?

A

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

25
Q

Find LV?

A

LF x 1.5 = LV

26
Q

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

A

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

SOC (12 decks)

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