HomeMy WebLinkAbout1.10 Structural review letterMRI May 2012
Appendix 1
Structural Review Letter
6 Limited Impact Review Appendix 1
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SCHMUESER 1 GORDON 1 MEYER
GLENWOOD SPRINGS
ENGINEERS 'SURVEYORS
April 5, 2012
Mr. Don Van Devander
MRI
1058 County Road 100
Carbondale, CO 81623
1 8 WEST SIXTH STREET, SUITE 200
GLENWOOD SPRINGS, CO 81601
970.945.1 004
970.945.5948 FAX
Sent Via Email: mritrash@comcast.net
Re: Structural Review of Planned Building Modifications for Loading Bay
Waste Transfer & Recycling Station, 1058 County Road 100
SGM Project No. 2011-414.001
Dear Don,
On Friday March 16, Dave Kotz and I met with you at the facility to perform a visual structural evaluation,
and discuss planned modifications to the west end of the main building. This effort would install an
opening in the wall to allow trucks to back into and load within the building. Based on this, it is my opinion
that the building is performing adequately, and that the proposed modifications can be implemented with
current construction techniques.
Observations
The building was originally constructed as a load out facility for a regional coal mine. In plan, it measures
84 ft in the north/south direction and 525 ft in the east/west direction. Exterior grade at the west end is
approximately 16.5 ft lower than interior grade. Exterior grade on the north, east, and south sides of the
building is approximately equal to interior grade. The roof is a gable type roof, with a raised section along
the ridge. It is framed with wide -flange steel frames at approximately 25 ft on center spanning north/south,
"Z" purlins at 4 ft oc spanning between frames, supporting metal roof deck . The frames follow the roof
slope of about 12:12. They are supported by concrete columns and foundations. Grade beams along the
north and south walls appear to be a combination of precast and cast in place members, located between
but not tied into the columns. The west concrete wall has an exposed height of 22 ft. I observed no
cracking or evidence of structural distress, which in considering the differential soil height of 16 ft, would
indicate it is well reinforced.
The lateral framing system is composed of the structural steel frames in the east/west direction, and rod -
type x -bracing in the north/south direction.
Modifications
The following structural modifications are planned:
1 Install a shored excavation 16 ft high by 12 ft wide by 40 ft long on the east side of the west wall,
inside the building. This can be accomplished by either installing a tie -back shoring system during
which the shoring and excavation are advanced in stages or by installing micropile soldier piles,
then excavating the new loading bay. The excavated face would be finished with either a
shotcrete or poured in place concrete wall.
GUNNISON ASPEN GRAND ,JUNCTION MEEKER
103 WESTTOMICHI AVE, SUITE A 101 FOUNDERS PLACE, UNIT 102 2768 COMPASS DRIVE, SUITE 102 320 THIRD STREET
GUNNISON, CO 81230 PO Box 2155 GRAND JUNCTION, CO 81505 MEEKER, CO 81641
970.64 1 .5355 ASPEN, CO 8 1 6 1 1 970.245.2571 970.878.5180
970.641 .5358 FAX 970.925.6727 970.245.2871 FAX 970.878.41 81 FAX
970.925.41 57 FAX
SCHMUESER 1 GORDON 1 MEYER
ENGINEERS 'SURVEYORS
2. Sawcut a 12 ft wide by 14 ft high opening in the existing west wall. Due to the past performance
of the wall, and the fact that this wall is not a bearing wall, we suspect no header type members
would be required. Structural analysis during final design would be required to confirm this.
3. Install a 16 ft by 20 ft covered metal frame structure on the west face of the west wall. This will
cover the cab of the trucks as they being loaded. A 6" to 8" concrete slab on grade will be placed
to provide a level, competent surface for the trucks to load.
This concludes our report. We are available to prepare final design documents for your planned
modifications at your request. As discussed, the modifications will require some phasing activities, but
based on our observations can be implemented without affecting the structural integrity of the existing
facility. Should you have any questions concerning the above, please call me at 970.384.9037.
Sincerely,
SCHMUESER GORDON MEYER, INC.
William B. Swigert, PE SE
Structural Engineer
2011-414.001_MRIWasteWaterTransferStructReport040512.doc 2