percent for waste is made on each item, so 550 pieces

required will be determined by counting the joints.

and 330 pieces would be listed respectively in the bill

Referring to figure 4-1, there are 30 joints. Only

of materials.

two nails are required per joint because the

maximum width is less than 8 inches. Thirty joints

per table x 2 nails per joint = 60 nails/table. The

job requirement is for 100 tables,

Nail requirements (par. 4-4a(4)) are expressed in

pounds of nails. The quantity of nails required can be

100 tables x 60 nails per table = 6000 nails

determined by counting the number of joints in

simple structures, by using the formulas for

From table 4-1, the allowance for waste for

approximate quantities or by using table 1-3 in lesson

common wire nails is 20%.

1. When the quantity of nails is determined by

6000 x 1.20 = 7,200 nails

counting joints, allow two nails per joint for material

up to 8 inches wide and three per joint for wider

The number of 10d per pound from figure 1-15 or

material.

table 1-3 is 74 nails per pound.

by use of the following formulas:

of nails to construct the 100 scrub tables required by

using the formula for framing members:

pounds of nails per MBF = 1.67d

= 1.67 x 10 =

16.7

Referring to paragraph 4-7**d**(3), there are 63 BF per

scrub table or 6,300 BF per 100 scrub tables or 6.3

MBF per 100 scrub tables.

times the thickness of the wood it is intended to hold

Thus the number of pounds of nails required:

if it is driven across the grain of the second piece of

wood and at least 3 times the thickness of the wood it

16.7 pounds of nails per MBF x 6.3 MBF =

is intended to hold if it is driven with the grain of the

105.21 pounds of nails **say 105 pounds of 10d**

second piece of wood. Table 1-3 gives some

recommended nail sizes and the quantities required

For this case, the formula gives a value that is

for various elements of frame structures.

8.25% greater than the exact amount plus the

standard allowance for waste

and quantity of nails required to finish 100 scrub

tables.

The greatest thickness of wood the nail is intended

to hold is 1 1/2 inches. The nails will be driven

across the grain of the second piece of wood. Nail

table 1-3 will illustrate its usefulness: What size,

lengths should be at least 1.5 or 2 times 1 1/2

kind, and quantity of nails are required to lay 1 x 4

inches. Two times the thickness of a 2 x 4 is 3.

flooring for a room 50 x 100, joists spaced 16 inches

Select a 3-inch length, or 10-penny common nail.

on centers?

Since this is a simple structure, the number of nails