HomeMy WebLinkAbout2613 Stanford Rd - Special Inspections/Engineering - 05/26/2009CTLITHOMPSON
May 26; 2009
Village on Stanford, LLL.P
1715 West Mountain Avenue
Fort Collins, Colorado 90
Attention: Jeff Valoric
Subject: Truss Top Chord Dead Loads
Stanford -Apartments Remodel,
2613 &(2701-Stanford-Road, Fort Collins, Colorado
CTQT Project Number: FC04399-500
Dear Mr. Valoric,
You have brought to our attention that 27sf solar panels weighing 115 pounds each will bear upon
the proposed new roof structure at the above referenced project. Per your request, we have
computed the minimum design dead loads for the truss top chords. Our calculations include 2-layers
of asphalt shingles over 7/16" thick sheathing over engineered trusses spaced at 24" on -center.
Based upon the above criteria, we have calculated the dead load conditions on the top chord and
they are as follow.
• Top Chord Dead Load = 7.5 psf (proposed building materials only) .
• Top Chord Dead Load = 11.5 psf (proposed building materials with solar panels)
Some of the trusses have been manufactured for the project. For these, the truss designer used a
top chord dead load of 10 psf. It is our opinion the slight increase in dead load will not adversely
affect the trusses as they are currently designed and manufactured (total load increase of about
4%). For new trusses, have the truss designer re -run their calculations using the higher dead load
and make adjustments to their design (if needed).
Thank you for selecting CTLITHOMPSON for your engineering. needs. When we can be of
additional service, please contactiti'ig'b'hiiersigned.
Very truly yours, a`~®P�J°°�!�S'��%/
CJ
J es A. Cherry, P
Project Manager
351 Linden Street 1, Suite 140 i Fort Collins, Colorado 80524
Telephone:970-206-9455 Fax:970-206-9441
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