Estimating in Building Construction

Wood 149

EXAMPLE 13-4 JOIST QUANTITY

FIGURE 13.8. Floor Plan.

Joist length 12(refer to Figures 13.8, 13.9, 13.10, and 13.11)

/ft38 spaces

Extra joists under walls (refer to Figure 13.8)

7 additional joists

Joists (2 bays) 39  2 78 joists

Use 39 joists

(add 1 to convert from spaces to joists)

Spaces 50 ¿ 0 –  0 .75 spaces

Purchase Quantity

Size Length (lf ) Pieces

2  10 12 85

Board feet  85 

2 –  10 –

12

 12 ¿  1,700 bf

FIGURE 13.9.Joist Headers.