Page 82 - 2018 National Home Improvement

2018 National Home Improvement Estimator, All Rights Reserved Page 65

Set 2" x 8" floor joist
Work done in a basement B1@.046 LF 1.12 1.68 2.80
Work done in a crawl space B1@.077 LF 1.12 2.81 3.93
Set 2" x 10" floor joist
Work done in a basement B1@.050 LF 1.45 1.82 3.28
Work done in a crawl space B1@.083 LF 1.45 3.03 4.48
Set 2" x 12" floor joist
Work done in a basement B1@.052 LF 1.92 1.90 3.81
Work done in a crawl space B1@.087 LF 1.92 3.17 5.09

Floor joist wood, TJI truss type. Initial use, 50 PSF floor load design. Costs shown are per square
foot (SF) of floor area, based on joists at 16" OC, for a job with 1,000 SF of floor area. Figure 1.22 SF of
floor area for each LF of joist. Add the cost of beams, supports and blocking. For scheduling purposes,
estimate that a crew of two can install 900 to 950 SF of joists in an 8-hour day.
9-1/2" TJI/15 B1@.017 SF 2.36 0.62 2.98
14" TJI/35 B1@.018 SF 3.76 0.66 4.41

Bridging or blocking. Installed between 2" x 6" thru 2" x 12" joists. Costs shown are per each set of
cross bridges or per each block for solid bridging and include normal waste. Spacing between the
bridging or blocking, sometimes called a “bay”, depends on job requirements. Labor costs assume
bridging is cut to size on site.
1" x 4" cross
Joist bridging, per MBF --@.000 MBF 1,626.10 -- 1,626.10
Joists on 12" centers B1@.034 Ea 0.81 1.24 2.05
Joists on 16" centers B1@.034 Ea 1.11 1.24 2.35
Joists on 20" centers B1@.034 Ea 1.41 1.24 2.65
Joists on 24" centers B1@.034 Ea 1.71 1.24 2.95
Add for work in a basement or first floor B1@.068 Ea -- 2.48 2.48
Add for work in a crawl space B1@.115 Ea -- 4.19 4.19
2" x 6" solid, Std & Btr
2" x 6" blocking, per MBF --@.000 MBF 674.68 -- 674.68
Joists on 12" centers B1@.042 Ea 0.75 1.53 2.28
Joists on 16" centers B1@.042 Ea 0.99 1.53 2.52
Joists on 20" centers B1@.042 Ea 1.23 1.53 2.76
Joists on 24" centers B1@.042 Ea 1.48 1.53 3.02
Add for work in a basement or first floor B1@.084 Ea -- 3.06 3.06
Add for work in a crawl space B1@.140 Ea -- 5.10 5.10
2" x 8" solid, Std & Btr
2" x 8" blocking, per MBF --@.000 MBF 654.48 -- 654.48
Joists on 12" centers B1@.042 Ea 0.96 1.53 2.49
Joists on 16" centers B1@.042 Ea 1.28 1.53 2.81
Joists on 20" centers B1@.042 Ea 1.60 1.53 3.13
Joists on 24" centers B1@.042 Ea 1.92 1.53 3.45
Add for work in a basement or first floor B1@.084 Ea -- 3.06 3.06
Add for work in a crawl space B1@.140 Ea -- 5.10 5.10
2" x 10" solid, Std & Btr
2" x 10" blocking, per MBF --@.000 MBF 678.72 -- 678.72
Joists on 12" centers B1@.057 Ea 1.24 2.08 3.32
Joists on 16" centers B1@.057 Ea 1.66 2.08 3.73
Joists on 20" centers B1@.057 Ea 2.07 2.08 4.15
Joists on 24" centers B1@.057 Ea 2.48 2.08 4.56
Add for work in a basement or first floor B1@.114 Ea -- 4.16 4.16
Add for work in a crawl space B1@.190 Ea -- 6.93 6.93