Estimating in Building Construction

Wood 157

Estimating Steps

1. Review the specifications and drawings for the thickness
   and spacing of studs and lumber grade.


2. The exterior studs will be required around the perime-
   ter of the building; the perimeter used for the sills and
   plates may be used.


3. Divide the perimeter (length of the wall) by the spacing
   of the studs to determine the number of spaces. Then
   add one to close off the last space.


4. Add extra studs for corners, wall intersections (where
   two walls join), and wall openings.

EXAMPLE 13-11 EXTERIOR WALL STUDS

Purchase Quantity

Size Length (lf ) Pieces

2  4 8 112



(a) Corners using 2 4 studs: a corner is usually

made up of three studs (Figure 13.25). This

requires two extra studs at each corner. Estimate

the extra material required by counting the num-

ber of corners and by multiplying the number of

corners by two.

(b) Corners using 2 6 studs: a corner is usually made

up of two studs (Figure 13.26), requiring one extra

stud. Drywall clips are used to secure the drywall

panel to the studs. Some specifications and details

require that three studs be used for 2 6 corners

(similar to the 2 4 corner).

Studs148 lf0.75 spaces per foot111 spaces — Use 112 studs

Using the 148 lf perimeter

Exterior walls 24s at 16– on center FIGURE 13.26.^2 6 Corner Stud

Detail.

FIGURE 13.25.Corner Stud.

FIGURE 13.27.Wa l l I n t e r s e c t i o n

Detail (2 4s).

EXAMPLE 13-12 CORNER STUDS

Add 2 studs per corner

Purchase Quantity

Size Length (lf ) Pieces

2  48 8



(c) Wall intersections: using 2 4 studs, the wall inter-

section is made up of three studs (Figure 13.27).

This requires two extra studs at each intersection.

The extra material is estimated by counting the

number of wall intersections (on the exterior

wall) and by multiplying the number of intersec-

tions by two.

Studs (corners)4 corners2 studs per corner8 studs