I-Joists as Roof Rafters

[Nick Ostrowski]

This is the 1st time I've seen this so I'm not sure what to make of it. The house I looked at yesterday had some areas of the roof rafters framed with I-joists. You'll see in the attached pics that the ends of the I-joists have had filler boards installed over the webs at the tail ends.

It doesn't look right but I'm not sure what to think.

Thoughts?

[Jerry Peck]

Nick,

Try here: http://www.askcodeman.com/tech_docs/structure/i_joists/TJ_9001.pdf

Sections 6 and 7 - those photos do not look right.

Also other sections.

[Nick Ostrowski]

Thanks Jerry. Very good reference material. The install definitely appears wrong on a few counts:

1 - the ends of the I-joist are notched and none of those instructions show any notching and the notching that was don on the ones I saw will place the entire load on the upper half or the I-joist

2 - the filler boards in my pics are secured with what appear to be staples and the refernce material you included calls for 10d nails at minimum

[Wayne Carlisle]

There may be an engineers report for this particular installation on this house. You might check with the AHJ and see if they have a copy of a report.

I know anytime we have a "different" situation like that, we require a report from the engineer that manufactured the trusses.

[Michael Garrity]

http://www.ilevel.com/literature/TJ-9001.pdf

What is supporting the joists shown in the picture?Did you look under the insulation for additional support?