you have to look at the connections of the web members to the chords and
how the chords are spliced if not continuous? You may be able to make
the joist into a plywood box beam by adding plywood to each side of the
joist and adding a metal strap along the bottom chord. Also, can you
add or sister in new joists?
> On 6/2/07, * DOLLY TRIVIZ* < dktriviz@msn.com
> <mailto:dktriviz@msn.com>> wrote:
>
> I have a project where we'd like to
> strengthen the existing open web floor
> joists (TJW) due to change of occupancy
> use. Loads have increased from 50 psf
> live +20 psf partition to 100 psf live
> with no partition loading.
>
> Has anyone ever strengthened these types
> of joists using FRP's adhered to the
> bottom chord only?? Is this even a
> possiblity, considering the different
> materials (i.e. wood chords, steel web
> members, steel pins) used in the
> joists? Presence of piping/ducting running
> through the web spaces precludes the use
> of sheathing the sides of the joists with
> plywood, which was my first thought. Any
> other suggestions?? Thanks
>
>
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