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Old 10-13-2011, 11:47 AM   #1
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Metal nailless bridging

I am looking to cross bridge the floor joists in my basement to stiffen up the floors above. I have found this metal nailless bridging that looks promising but I'm not exactly sure how to install it? It says it can be installed before or after sub flooring/sheathing and that it takes one nail to install. Does anyone have any experience with this type of bridging? Which direction does it install? Or doesn't it matter? It looks like the nail would go in the end with the 3 pointy teeth? I am wondering how would to install so that it attaches to both joists? Thanks for any insights!

Product Link:
Steel Grip Tooth Bridge (USP #MBG1016)

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Old 10-14-2011, 07:06 AM   #2
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MBG – Grip tooth bridging. Features special teeth which grip joists and provide easy single-
nail installation. Can be installed after subfloor is in place.
MB16 – Snap-on, no-nail bridging can be placed in existing floor systems where joist
movement is suspected. Two-piece construction creates a solid diagonal brace against
joist movement.
Materials: See chart
Finish: G90 galvanizing
Codes: ESR-1781, L. A. City RR 25843, FL13285
• Use specified fasteners in models with fastener requirements.
• For all models – Bridging should be installed on floor joists with a nominal depth-tothickness
ratio of 5 to 6 or more (2005 National Design Specification for Wood
Construction; Section 4.4.1). Bridging units should be installed in pairs at intervals of 8Žor
less. Bridging pairs should form an “X” between joists; leave a slight space between the
units to avoid noise-generating contact. Follow specific installation instructions below for
particular models.
• MBG – May be installed before or after sheathing. Position the unbent end of the bridging
unit near the top of the joist and drive prongs into wood with a hammer blow to the
heel of the bent end. Wedge bent end near the lower edge of the opposite joist, set teeth
into wood with hammer blow. Nail holes are provided at the bent end if prongs are damaged
during installation. Fully seat nails to avoid any movement against the bridging and
subsequent floor noise.
• MB16 – Two-piece unit is shipped as one piece. Bend unit in center up and down to
break into two pieces. Slide narrower piece inside wider piece, setting the end tab into
slot appropriate for joist spacing. Setting one prong end near the top of one joist and the
opposite prong end near the bottom of the opposite joist, pull down on the center of the
bridging until the wider piece snaps into place over the narrow piece and creates a rigid,
one-piece bridging unit. Wear gloves during installation.


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Old 10-14-2011, 07:26 AM   #3
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Thank you!
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