HomeMy WebLinkAboutEngineer's Letter Foundation 07.07.2021OSGM
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luly 7,202L
Mr. Jim Wilson, Building Official
Garfield County Building and Planning
108 8th Street, Suite 401
Glenwood Springs, CO 81601
RE McPherson Shop
2299 CR 311
New Castle, CO
Dear Jim,
The purpose of this letter is to follow up with you the results of two site visits and coordination with the
contractor for the McPherson Shop located at2299 CR 311, New Castle, CO. We performed site visits on two
occasions with the purpose of providing an open hole observation of the foundation soils for the foundation and
secondly to observe the construction and formwork for foundation modifications coordinated with the
contractor that deviated from our proposed plans for construction.
The first observations were of the footing formwork, reinforcing and open hole observation while second was for
the stem wall formwork and reínforcing, For the first observations, performed on 5/28/21, we were able to
confirm that the soil conditions were as anticipated for the design of the foundation system. For the second
observations, performed on June 30, 202L, the formwork and reinforcing were evaluated to confirm the
modifications to the design for a mid height #4 bar installation in the stem wall in lieu of a #5 bar. Likewise, the
provísion of perimeter 24' long hooks into the slab from the stem wall for the foundation were provided to
provide thrust resistance to horizontal loading thus removing the requirement of the isolated haírpin installation
requirement at the main frame columns. This modification also allowed the resolution of the contractor not
locating footings D, E and F per our original design.
With the observations and modificatíons, we concur with the construction provided
Upon your receipt and review, if you have any questions, please don't hesitate to contact me
Respectfully,
S. Simonson, PE
Principal
I l8 West Síxth 5t, Suite 200 | Glenwood Springs, CO 8l 601 | 97A.945.1004
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GLENWOOD SPRINGS