HomeMy WebLinkAboutEngineer Report 07.17.2020KURTZ & ASSOCL{I'ES.I}iC. sTRtlcÏ[rllltI. CoNSqLTANTS
SOtã County Road 154 Phone & Fax (970) 945 6305
Glenwood Springs, CO 816Û1
MEMORANDUM
To:
Attn:
Garfietd Count Building and Planning
Matt Provost, Building Official
Jr.rly 17, 2020
Re: Proposed Sunroom Addition: Allison Residence ú625 Met Ray Road'
Garfield County, CO.
Our office is the design engineer of record for the proposed addition. As such we
issued construction documents dated Nov. 01, 2019. We understand that the general
contractor (Levi Troyer) made three changes relative to the structural documents.
The original structure is a two unit, factory built, modular home erected on a lower
level with cast in place concrete foundation walls. The south end of the lower level is a
tvso car garage, and a concrete retaining wall on the east side of the driveway allows
âccess into the garage. The sunroom addition is on the east side of the residence and a
portion of the addition's west wall is directly above the noted retaining wall. The
òonstruction documents specified a 4 x 10 timber beam directly above and parallel to the
retaining wall. The floor of the addition creates a crawl space which requires ventilation.
Consequently, the architectural construction documents specified that the east and south
faces of the crawl space be screened for ventilation. The general contractor substituted a
wood stud bearing wall (2 x 6's at 16" O.C.) for the noted 4 x 10. He provided a 3'-0"
wide access opening in the wall with a (3) - 2 x 6 header and (2) - 2 x 6 header support
posts ((1) jact + (l) king). This substitution is structurally acceptable, but ventilation of
the crawl space needs to be maintained.
The roof of the addition was specified as a 3/12 shed roof with 2 x 12 rafters at
?4" an center spanning l3'-0" east to west. The shed roof over-frames the existing house
roof and the structural documents detailed 2 x 6 rafters at24" on center as the over-
framing. The general contractor substituted ll.7l8* LVL rafters spaced ^t24" on center
ficr the 2 x 12's and the 2 x 6 over-framing. This substitution is structurally acceptable.
For electrical wiring two (2) rows of 3/4" diameter holes were drilled in the noted
LVL rafters. The holes are located approximately mid-height of the LVL'S, are
approximately 8" aparl, and are located approximately 4'-0" from the west wall of the
addition. These holes are structurally acceptable.
If you have any further questions, feel free to call
Kurtz & Associates, Inc.
Brian J. Kurtz, P.E.
'I
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