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floor squeeks – simpson brackets

hotair | Posted in Construction Techniques on September 30, 2005 02:53am

I am building a new house and am paranoid about floor squeeks.

Radiant heat using 1 1/2″ concrete (not the light weight stuff)

All trusses, 3/4 T&G ply glue, staple and screw. Almost every kind of flooring===wood, tile and carpeting. Most of the floor supported on ledgers but 20% on Simpsons.

It’s the Simpsons that are the most concern to me. Local advise sez to glue the trusses to the simpsons, but I am wondering if something that will remain more plyable over time might be better.  Even something “spendy” like Dow 5200 which is a rubberized sealant used a lot in boatbuilding.

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Replies

  1. Scooter1 | Sep 30, 2005 07:26pm | #1

    Gluing wooden trusses to galvinized sheet metal Simpsons?

    I just can't imagine that would add any strength whatsoever.

    If you are worried about sqeeking, I'd consider a couple of things.

    First, I'd consider an upgrade to inch and an eighth t&g subfloor. These are awesome panels--very very strong.

    Second, I'd consider adding metal cross-bracing to the trusses.

    Lastly, before you get too far down the road, have a structural engineer or a tile guy run the trusses through a defection calculator to make sure that the flooring will be L720, so you preserve the option to use stone on the floor, should you choose to do so.

    Regards,

    Scooter

    "I may be drunk, but you're crazy, and I'll be sober tomorrow." WC Fields, "Its a Gift" 1934

    1. User avater
      BossHog | Oct 01, 2005 02:33pm | #4

      Putting metal braces on wood trusses would be more likely to CAUSE squeeks.It certainly wouldn't help prevent them.
      Have you ever imagined a world with no hypothetical situations?

  2. BillBrennen | Oct 01, 2005 09:57am | #2

    PL Premium will work fine in the hanger seats. The 5200 will, too. You don't need many tubes to dab every seat, so use the 5200 if it feels more durable. It isn't THAT expensive.

    Bill

  3. oceanstatebuilderinc | Oct 01, 2005 01:46pm | #3

    Glue in the truss hangers is recommended to stop movement and therefore squeaking. As far as rubber goes, if it allows the joist to move it will squeak. Are these I-joists, trusses or 2x material?
    In all of the I-joist systems, and floor truss systems we build, glue is added to every hanger to prevent squeaks and pops. If you are concerned with strength, I suggest PL400 the Polyurethane Based Adhesive.

    Ocean State Builders, Inc.
    Wilmington, NC

    Fine Custom Framing and Exterior Trim

  4. hotair | Oct 01, 2005 06:48pm | #5

    Thanks all for the advise. I have had joices work against the  metal brackets and glue was suggested to keep the relative motion down---not for strength. In this case I am using 20 and 24 inch trusses (long spans and high deadweight).  In addition to a sealant I  was thinking of using the "trick" that I found in FH for the new pressure treated lumper   which is wrapping the interface with building paper to ast as a kind of a lubricant. 

    1. JohnSprung | Oct 04, 2005 03:28am | #6

      >  glue was suggested to keep the relative motion down---

      A flexible adhesive -- or any kind of permanent glop, for that matter -- will do the trick.  But not by reducing the amount of motion.  What it does is let the motion happen without it making noise.  You want something that will flex uniformly rather than holding until the force on it is greater than the friction, at which point it pops to the next holding place, and so forth at a frequency in the audible range. 

       

      -- J.S.

       

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