HomeMy WebLinkAboutEMAIL - 05-00042 - 625 S 4th E - New SFRe
05- IV cc$a `fz-
D Y E R
GaouPi«
ENGINEERING • PLANNING • MANAGEMENT
March 21, 2005
Quinton Owens
City of Rexburg Building Department
P.O. Box 280
Rexburg, ID 83440
Re: Devin Hughes Residence
Dear Quinton:
Thank you for the time you spent with me the other day about your concerns on the structural
design and performance of the proposed Devin Hughes residence in Rexburg. The two
concerns you had were regarding the connection of garage framing to the foundation at the front
of the garage, and transfer of lateral forces across the main floor level where the large room is
interrupted by a circular stairway.
Garage Framing
We agree there is concern for appropriate transfer of lateral forces across the opening of large
garages. We have directed the builder to address this by anchoring the framing on each side of
the garage door openings to the foundation with a bolted connection, constructing a blocked
and diaphragmed member out of the vertical framing on each side of the door opening, and by
providing a continuous header across the top of all openings to the corners of the wall. These
provisions will provide the appropriate structural systems to properly carry lateral forces across
the front of the garage opening.
Great Room, Main Floor
The combination of a large open room with an open circular stairway near the middle does
create some concern for transfer of lateral forces through the area. Upon further examination of
the plans, we have recommended to the builder that the shear forces in the shear wall left of the
"rotunda" on the main level be transferred into a similar shear wall structure in the basement
below.
Additionally, the right wall of the rotunda area (curved wall extending up through all three levels)
will be sheathed and therefore be able to carry shear forces in multiple directions due to its
curved configuration.
Lastly, the header structures above the openings in the basement level left of the rotunda
(stairwell) area will be made contiguous to carry to the forces from the basement shear wall
across to the sheathed wall on the right side of the circular stairway area. After that, the floor
joists for the main level and the structural framing in the basement will continue to carry lateral
forces to the right foundation wall.
THE DYER GROUP, LLC • 310 N 2ND EAST, SUITE 153 - REXBURG, ID 83440 - 1607
208.656.8800 (VOICE) 9 877.721.5025 (TOLL FREE) • 206.656.8808 (FAX) • 208.390.9700 (CELL)
0
Conclusion
There were two concerns with this structure as presently designed in comparison with the
current building code. The above described stipulations will address those concerns and allow
the proposed residential structure to properly transfer lateral forces when required.
We appreciate you working with us on these concerns and trust the foregoing information will be
adequate to resolve them and issue the building permit. Should you or other reviewers have
further questions, please don't hesitate to contact us.
Sincerely,
The Dyer Group, LLC G'N f� is
Winston R. Dyer, PE 4�I�
Idaho Structural Engineer No. 4315 s�/u�OSZo
qlF
F
CC: Devin Hughes ��PoST NR