HomeMy WebLinkAboutEngineer's Letter 03.19.2016KURTZ & ASSOCIATES, Inc.
5012 County Road 154
Glenwood Springs, Co. 81601
MEMORANDUM
TO: WHOM IT MAY CONCERN
Structural Consultants
Phone + Fax (970) 945-6305
COPY: KRISTIN DAVIS
COPY: FOUNDATION REPAIR of WESTERN COLORADO
RE: Davis Residence:
136 Silver Mountain Drive,
Ironbridge Subdivision; Garfield County, Colorado
(2) Pages
March 19, 2016
Our office issued construction documents dated February 25, 2016 relative to
foundation repairs for the noted residence. These documents specified the
installation of twenty-six (26) driven structural steel piers to underpin and
stabilize a portion of the residence's foundation. The noted construction
documents specify pier locations and the required safe design load each pier is
to support. Note that ten (10) piers had previously been installed to stabilize
the entry and north end of the home.
The construction documents also detailed a structural floor to replace the
existing concrete slab -on -grade floor in the garage. The garage was excavated
to create a crawl space so that the piers in that area could be installed from the
crawl space. The twenty-six (26) specified piers included sixteen (16) piers in
the existing crawl space and ten (10) piers in the garage.
The specified piers were installed by Foundation Repair of Western Colorado in
late February and the first week of March of 2016, and the piers were
hydraulically loaded to lift, re -level and stabilize the foundation on March 07,
2016.
Upon excavation of the garage it was determined that the garage foundation
walls were approximately 7'-0" tall. The design of the garage support piers
assumed a foundation wall height of 5'-0". The design process considers the
weight of the structure, design snow loads and live loads, the weight of the
foundation and the weight of the a wedge of soil bearing on the exterior section
of the continuous footing. It was determined that it would be appropriate to add
three (3) additional piers in the garage. The design decision was based on three
(3) sides of the garage being exterior walls (a total of approximately 68'-0") and
an additional design load of slightly Tess than 1000 PLF to account for the
additional soil wedge and garage foundation wall weight.
2
I have reviewed the "Pier Summary" and "Pier Analysis" provided by Foundation
Repair of Western Colorado. I have also discussed the results of the installation
procedure Larry Blatt of Foundation Repair of Western Colorado. Note that the
installed length of the piers was consistently approximately 20'-0" to 23'-0" below
the crawl space floor.
It is my professional opinion that the foundation repairs have been successfully
performed in accordance with the noted construction documents.
Kurtz and Associates, Inc.
Brian Kurtz, P.E.
03