Bridging

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1

Originally Posted By: kmcmahon
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Is bridging required on engineered floor joists?

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2

Originally Posted By: bking
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I don’t think bridging is required but, around here the county usually requires “squash plates” this is framing at the ends of the engineered joists only. The joist manuf. says they are not needed but the county can require them it seems. This was the floor system of the 2nd story. I think the 1st floor used dimensional lumber.

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www.BAKingHomeInspections.com

3

Originally Posted By: Kyle Kubs
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No. Bridging is not required on I Joists…

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Those that say it cannot be done should stop interupting those of us who are hard at work, doing it…

4

Originally Posted By: scieslewicz
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Kevin,


No bridging for the manuf. I joists but squash blocks usually at the bearing points. Some of the manufacturers say that the squash blocking is not needed but I look for them if plans call for them in new construction and then on existing construction at the bearing points.

Sue

5

Originally Posted By: ccoombs
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In my part of town they are required if the joist are over 12" deep and a span greater than…I don’t remember the span length. I am also seeing a product called IBS blocking used to increase floor performance. It reduces the deflection and “bouncyness” of the floor system.

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Curtis

6

Originally Posted By: Michael D Thomas
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The IBS site:


http://www.luxorcorp.com/subpage/products.htm

7

Originally Posted By: lfranklin
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What if they are cantilever?


Could be wrong but thought that TIJ joist needed something to keep them from rotating at that point.

8

Originally Posted By: ccoombs
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Yes, all joist need something to keep them from rotating at bearing points. I-joist can be installed with a one or two nails at the bottom flange to the top plates. At the top, you can use flat blocking. However, in this part of the country you typically have shear walls that would require full depth blocking…so you don’t see this a lot in California.

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Curtis

9

Originally Posted By: roconnor
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I-Joists usually only need blocking at support points, in areas of concentrated loads, and at bearing walls (fire blocking also). Sometimes it is added to stiffen a floor.


Here is a link to a pretty good I-Joist guide from APA called "Performance Rated I-Joists" (APA #Z725 ... may require simple registration to access)

http://www.apawood.org/pdfs/managed/Z725.pdf

Websites for the various I-Joist manufacturer's (like TrusJoist ... at www.trusjoist.com) also have a lot of good info and framing guides.

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Robert O'Connor, PE
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I am absolutely amazed sometimes by how much thought goes into doing things wrong