Would Simpson SD fasteners be ok?"

Do they have a solid shank larger than the threaded portion?

The fit of the screws in the drilled holes in the strap is critical.

Another easy way to do it is shown in the link below.

A Simpson WB wall bracing strap is 1 1/4" wide and 16 gauge

Here is a link that might be useful: joist reinforcement

"A Simpson WB wall bracing strap is 1 1/4" wide and 16 gauge "

And barely adds any real stiffness.

I haven't tried it myself but the article says the floor was "substantially stiffened" and the strength of the strap in tension is over 3,000 lbs. so it's worth a try.

"strength of the strap in tension is over 3,000 lbs. "

That does not mean very much for this application, it s just advertising puffery.

Just a follow up:

Found a old-time hardware store that had boxes of old "cut thread" tapered wood screws. Flat head not fun to install but job is done and couldn't be any happier.

Now measured deflection with a dial indicator under the joists is .030" with a 290lb load walking across it (230lb guy carrying 60lb bucket of joint compound).

Forgot to do before and after measurements but walking on it is night and day different.

Hi captrichjackman,

I was wondering if you're still satisfied with the metal strapping you did to stiffen your joists.

Did you install the straps as per the link below? Is the tile still looking good?

Thanks!

Here is a link that might be useful: Metal strap installation

This post was edited by Agarwal on Thu, Apr 18, 13 at 0:38