10:56AM | 03/01/04
Member Since: 02/29/04
1 lifetime posts
I am intersted in remodeling an attic above my detached garage that was built with fink type engineered trusses. Assuming the load bearing walls below are to code, is there someway to open space by converting to rafters without removing the entire roof and starting over. Could I somehow reinforce floor joists (22'span) and butt 6" rafters next to roof portion of trusses and cut way the interior web taking up the space.


01:07AM | 03/04/04
Member Since: 01/28/03
693 lifetime posts
What you propose is not practical for many reasons.

First, your current trusses will likely be constructed from 2x4s which will also not likley be able to be bear the loads for the roof nor the floor.

Second, without opening the roof it is not practical to install properly sized rafter to increase the load bearing capacity.

Third, your biggest problem will be with adding floor joists to support a clear span of 22'. No dimensional lumber will be able to meet code for loads if you free span 22'.

This means you will either need to install engineered floor trusses or I joists or install a center beam thru the garage to shorten the overall span of the joists.

The bottom line is, that without major alteration to the existing roof system can you do as you propose.

Should you decide you still wish to proceed, it may be simpler to demolish the entire roof system and start over.
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