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HomeMy WebLinkAboutLetter from Engineer 09.21.20126SGM MEMORANDUM TO: Jim Wilson, Building Inspector Garfield County Colorado FROM: Nathan Torres, PE SGM DATE: September 21, 2012 RE: Boyd Residence at 1253 Kings Row St. Carbondale, CO On August 17, 2012 I made a site visit to the Boyd-Misunas residence for a structural review of the ongoing remodel. Two conditions had been specifically brought to my attention for review prior to my visit. The existing parallel chord roof trusses had to be cut back at their upper floor bearing level. I had consulted with the owner and general contractor about this condition prior to my visit. Upon review of several photographs provided by the owner via email I requested that the general contractor provide (2)-2x6 blocking tight between the parallel chords and sheath both sides of the truss with 5/8" ply or OSB. The nailing pattern I provided was; 8d 4" o.c. perimeter nails with 8d at 6" o.c. field nails. During my site visit on August 17t I specifically inspected these trusses and found them to be compliant with the aforementioned modification. 118 W. 6'h St, Ste 200 Glenwood Springs, CO 81601 Phone: 970-945-1004 Fax: 970-945-5948 The second item that was requested by the owner and general contractor was to open the existing door/walk way at the existing dining area. The contractor proposed adding an additional 2x8 ply to the existing 2 -ply 2x8 header with a nailing pattern prescribed by SGM. The existing opening was 6'-0" and the owner wanted to increase the opening to 10'-0". Per my direction the contractor added 1 additional 2x8 header and nailed with 2 rows of 16d nails @ 16" o.c. and then provided a second set of 6" timberlok screws at 16" o.c. The contractor also added additional stud columns for bearing at each end. I reviewed this modification during my site and found it to be compliant with the recommendations I had provided for said modification. If you should have any questions in regards to this memo please feel free to contact me. Regards Nathan Torres, P SGM Nathant[a?sgm-inc 970-384-9066 .cam 118 W. 6'h St, Ste 200 Glenwood Springs, CO 81601 Phone: 970-945-1004 Fax: 970-945-5948