Truss question

[John McKenna]

Originally Posted by mcyr

I believe that Dale and Larry are on the right track here, but what confuses me and that is because of no pictures is why they would have been installed on on side only. Truss speaders are popular, but are normally seen on both sides of the gable. On a typical house, you would see about three on both sides of the gable roof.
We might all be speculating here, but seems to be the right guess.

Marcel

Spacers put on one side to hold the trusses in place long enough
to deck the roof on one side. The other side is decked without
spacers because the crew pulls the truss in and out, according
to how each sheet of plywood breaks over the rafter.

Slap and go. The spacer is not a critical item, once the decking
is fastened in place. Spacers can be temporary items to help
hold trusses in place, until decking goes down.

[Marcel R. Cyr]

Originally Posted by jmckenna1

Spacers put on one side to hold the trusses in place long enough
to deck the roof on one side. The other side is decked without
spacers because the crew pulls the truss in and out, according
to how each sheet of plywood breaks over the rafter.

Slap and go. The spacer is not a critical item, once the decking
is fastened in place. Spacers can be temporary items to help
hold trusses in place, until decking goes down.

That is exactly what I was leaning to in my post by not understanding the one sided spreaders.
It is of the up most importance to have the joist spreaders on both sides just for safety sake, and do not care if the roof is sheathed in one day along with the truss erection. While people are out to lunch a gust of wind might come up and blow the house down, if you know what I mean. I have seen too many wood trusses collapse in my area due to poor and inadequate erection procedures to write a book. I have provided links to try and explain what I am talking about. This is serious, and I know that in the fast lane it happens on a daily basis and the intent of the joist spreaders is not a substitution for lateral bracing, it is only a time saver for spacing. The normal lateral bracing temporarily required still needs to be executed until the roof sheathing is installed. The higher the pitch of the roof and wider the span, the more important it becomes safety wise.

http://www.sbcindustry.com/images/pu...HPSESSID=cvneo

http://www.sbcindustry.com/bcsi.php

http://www.gov.mb.ca/labour/safety/roofguide.html

http://www.wwta.ab.ca/Handling.html

This is what I do.

http://www.sbcindustry.com/images/lo...dj8btvi63ma9f2

Marcel
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[John McKenna]

Marcel,

You are correct. Temp spacers are a temptation for
disaster. If done properly, the spacers are not a
critical item once the decking is fastened.

Some framers install enough bracing along the
way to still use the temp spacers along one side.

We never left the trusses over night without
extra bracing.

[Mike Truss Guy]

Similar products are made by several companies. They are referenced in this publication. It is very large, read only PDF file and is available for purchase from www.WoodTruss.com - BCSI is essentially the bible when it comes to how to brace, handle, and install wood trusses.

http://www.sbcindustry.com/docs/06_B...klet_FINAL.pdf

See Option 3 on Page 24 (Which is actually page 38 of 115 in the PDF file)