Use and Care Manual

314
Copyright © 2018 MiTek Industries, Inc. All Rights Reserved
General Hardware
General Hardware
MiTek
®
Product Catalog
O / N Bridging
O
Typical O installation
Typical N installation
O – The O series spans three joists in under/over installation. Prong teeth
in the center help reduce nailing.
N – The N series spans two joists per unit. Can be used for bridging or bracing I-Joists.
See chart.
Materials: See chart
Finish: G90 galvanizing
Codes: IBC, FL, LA
Installation:
• Use specied fasteners in models with fastener requirements.
• For all models – Bridging should be installed on oor joists with a nominal depth-to-thickness
ratio of 5 to 6 or more (2018 National Design Specication for Wood Construction; Section
4.4.1). Bridging units should be installed in pairs at intervals of 8' or less. Bridging pairs should
form an “X” between joists; leave a slight space between the units to avoid noise-generating
contact. Follow specic installation instructions below for particular models.
• Install prior to suboor sheathing. Use (2) 8d (0.131") x 1-1⁄2" nails at each end. Fully
seat nails to avoid any movement against the bridging and subsequent oor noise.
• Must be installed in cross pairs. Avoid bridging overlap, it may cause squeaks
Joist Installations
Ref. No. W L Qty Type
N16 LTB20, TB20 22 3/4 19-3/4 4 8d x 1-1/2
O40 LTB40 22 3/4 39-3/4 4 8d x 1-1/2
N27 TB27 20 3/4 26-13/16 4 8d x 1-1/2
N30 TB30 20 3/4 29-13/16 4 8d x 1-1/2
N36 TB36 20 3/4 35-13/16 4 8d x 1-1/2
N42 TB42 20 3/4 42 4 8d x 1-1/2
N48 TB48 20 3/4 48 4 8d x 1-1/2
N54 TB54 20 3/4 54 4 8d x 1-1/2
N56 TB56 20 1 56 4 8d x 1-1/2
N60 TB60 20 1 60 4 8d x 1-1/2
O16 -- 18 1 44 4 8d x 1-1/2
1) For joist spacing, refer to the Joist Installation chart.
2)
NAILS:
8d x 1-1/2 nails are 0.131" dia. x 1-1/2" long.
IBC,
FL,
LA
Dimensions (in)
MiTek USP
Stock No.
Steel
Gauge
Fastener Schedule
1
Code
Ref.
12" 16" 19.2" 24" 30" 32" 36" 42" 48"
7-1/4 --
O40/O16/
N16
N27 N27/N30 N36 N36 N42 N48 N54/N56
9-1/4 N16
O40/O16/
N16
N27 N30 N36 N36 N42 N48 N54/N56
9-1/2
O40/O16/
N16
O40 N27 N30 N36 N36 N42 N48 N54/N56
10 N16 N16 N27 N30 N36 N36 N42 N48 N54/N56
11-1/4 N16 N16 N27 N30 N36 N36 N42 N48 N54/N56
11-7/8 N16 N27 N27/N30 N30 N36 N36 N42 N48 N54/N56
12 N27 N27 N27/N30 N30 N36 N42 N42 N48 N54/N56
14 N16 N16 N16 N27/N30 N36 N36 N36 N42 N56
16 N16 N16 N27 N30 N36 N36 N42 N48 N56
18 N16 N16 N27 N30 N36 N36 N42 N48 N54/N56
20 N16 N27 N27/N30 N30 N36 N36 N42 N48 N54/N56
22 N27 N27 N30 N30 N36 N36 N42 N48 N54/N56
24 N27 N30 N30 N36 N36 N42 N42 N48 N54/N56
26 N30 N30 N30 N36 N42 N42 N42 N48 N54/N56/N60
28 N30 N30 N36 N36 N42 N42 N48 N56 N56/N60
1) Gray shaded cells represent bridging installed on the face of the joist; web stiffeners required for I-Joists.
2) All bridging products require (2) 8d x 1-1/2 nails at each end, which are 0.131" dia. x 1-1/2" long.
Joist
Type
2x
Sawn
Dimensional
1-3/4"
SCL
I-Joists:
2-1/2"
&
3-1/2"
wide
Joist Spacing
1
Joist
Height
L
W
N
L
W