HomeMy WebLinkAbout935 N COLLEGE AVE - SPECIAL INSPECTIONS - 4/15/2003April 15, 2003
Project No: 1207-49-03
Bonnema Construction
P.O. Box 270921
Fort Collins, Colorado 80527
Attn: Brian Bonnema
Re: Lot 9-12, Block 2, Riverside Park; Fort Collins, Colorado
935 North College Avenue /�?a?zo ;? 6o/ C I / /_
Cyxt���S
Dear Mr. Bonnema, �c _Z"S
This building was damaged during the snowstorm that occurred Tuesday and Wednesday (March
18-19, 2003). The roof joist components and exterior walls were not damaged during this event.
However, the center support beam was severely deflected and did not return to its original shape.
GENERAL CONDITIONS
The building is a wood -frame structure with a center roof support beam. The beam currently
clear -spans the thirty-six foot (36') width of the building. There is some indication that the beam
was originally supported mid -span by a steel column that was supported by an interior footing.
At some unknown time, the post was removed.
CURRENT OBSERVED CONDITION
The current W8xl8 steel beam is clear -spanning thirty-six feet (36') and is in a deflected shape
approximately eight inches (8") below level, at the center point. The beam deflected during
excess long-term snow loading due to the storm and never returned to its original shape.
Permanent structural damage has occurred in the beam and it will require replacement.
CONCLUSIONS AND RECOMMENDATIONS
Our analysis indicates that the existing W8x18, clear -spanned thirty-six foot (36') steel beam,
was not adequate to support the roof loading. The beam has deflected and sustained permanent
damage and will require replacement.
Based on your request, Shear Engineering Corporation checked the beam size requirement for
the replacement beam with the center post reinstalled. Our analysis indicated that a W8x18 steel
beam would provide adequate support for the peak anticipated roof loading. A three and one-half
inch (3.5") diameter steel column (schedule 40) should be installed at the center beam bearing
location. This post shall rest on the existing foundation system.
4836 S. College, Suite 12 Ft. Collins, CO 80525 (970) 226-5334 Fax (970) 282-0311 www.shearengineering.com
PAGE 2
April 15, 2003
Project No: 1207-49-03
Re: Lot 9-12, Block 2, Riverside Park; Fort Collins, Colorado
935 North College Avenue
CONDITIONS AND LIMITATIONS
This letter addresses only the structural elements of the building as specifically described above.
This letter is based solely on contractor provided information. Any discrepancies shall be
brought to our attention prior to construction.
We have not reviewed any plans for this building, nor have we reviewed this building, as a
whole, to determine code compliance. No opinion is made regarding the adequacy of the
original design of this building. The modifications proposed in this letter are intended only to
provide functionality relative to the adjacent construction.
The recommendations made herein are for the loading present at the time of this design. If
additional snow or rain loading is added to the building, the statements made in this report may
need to be revised.
If you have any questions concerning our observations, please call at (970) 226-5334.
Sincerely,
20262
Wyatt M. Knutson, E.I.T.
Shear Engineering Corporation
BWS / wink
Brian W. Shear, P-E-'
Shear Engineering Corporation
cc: City of Fort Collins Building Department