HomeMy WebLinkAbout636 PETERSON ST - SPECIAL INSPECTIONS - 8/23/2000Charles C Robinson, PE (970) 493-0178
319 South Grant Avenue, Fort Collins, Colorado 80521 Fax(970) 407-7392
Wednesday, August 23, 2000
Fort Collins Building Department
and
Steve Josephs
Craftsman Builders
Fort Collins, Colorado 8052
RE: Foundation and existing structure at 636 Peterson Street Fort Collins Colorado
Dear Sirs,
On August 22, I visited the home at 636 Peterson Street. The builder and owner have proposed addition of a
second story addition to the home. I have also reviewed, modified and stamped the building plans.
The home was built in the early portion of the 20t' century and is typical in construction of other homes in that
neighborhood The home is built on a concrete foundation. The exterior walls appear to be 8" concrete basement
walls. The south half of the home is over a basement, the north half is over a crawlspace. The quality of the
concrete work appears to be of good quality. As with any existing foundation, there are some unknown details,
such as degree of reinforcement. There was very little settlement of the foundation except for the front porch slab
(typical). The home appears to have 2x8 @ 16" c/c floor framing with lx sub flooring and pine finished floors, 2x4
@ 16" walls and 2x4 @16 c/c ceiling joists.
The proposed addition would remove the roof of the home leaving the existing ceiling joists in place. Over that
would be added a new floor system, walls and a roof. The effective roof loading of the foundation will remain
similar while the occupancy loads and material weights will increase by the second floor loads. The addition
appears historically sympathetic in style to other two story homes in Fort Collins.
It is our opinion that the existing home foundation and framing can reasonably accommodate the addition of a
second floor as reviewed by our office.
One comment concerns the front southwest corner of the home. The second floor will increase loads on the corner
of the front porch slab. The slab has settled somewhat over the years as indicated by cracks where the slab joins the
main foundation. It is likely this slab has a shallow footing and in the construction process, the builder will
excavate the corner and inform us of his findings. If needed, the foundation can be reinforced by installation of a
footing at frost depth appropriate -to -the loading: if addition- is required the additional footing ought to provide at
least 16" SQ or equivalent bearing area for the future loads (2500 psi soil and DL + �/2 LL of 4600 lbs).
veoffRobinsun, PE
Structural / Civil Engi
File: Josephs 8-23-2000 Peek Home.doc Job Reference: 00-160