HomeMy WebLinkAboutBLD2007-02306 ENG LTR.TIFMar 05 OB 06:21. Geerse A. Harrison [7041 375 -1887 p.2
March 5, 2008
Joe LaMonica
LaMomca Builders
P.O. Box 2400
Denver, NC 28037
Attn: Doug Turner
Re: Structural Framing Evaluation
Pebble Bay — Lot 208
Permit # BLD2007 -02306
HCCE - 0308048
HARRISON
C O N S T R U C T I O N &
CONSULTING ENGINEERS
Dear Doug:
As requested, Harrison Construction and Consulting Engineers conducted an on -site inspection of the
damaged floor joist above referenced site. The inspection was conducted on March 4, 2008 in support
of an evaluation to determine structural integrity of two 1-joists which had been cut to provide access
for electrical wires.
The damaged joists are both located in the garage ceiling at the back right comer as referenced walking
into the garage. The 1-joists are directly off the wall between the house and the garage. The joists
have a hole cut into the web that measures approximately 4.5" x 24" and is approximately six (6') feet
off the end of the joist. All the joists in the garage ceiling are 14" 360 TA joist spaced at 16" on
center.
We evaluated two (2) scenarios for the damaged joist. The first evaluation considered the damaged
joist to be completely inactive and assumed the remaining joists were spaced across the ceiling at 24"
on center. This analysis indicated the joist would be adequate to support the loading however, there
could be a small amount of vibration to the floor in this case. Based on the location of the joist and the
proximity of the joist to the wall (6" off the wall), it is highly unlikely there would be any additional
vibration of the floor in this case as the remaining joist across the floor are actually spaced at 16" on
center.
The second analysis simply evaluated the joist for shear across the cut section. The hole removed
approximately 53% of the web material at the cut section. The actual shear loading at the cut is
approximately 280lbs. The allowable shear load at the cut based on a reduced section is a total of
485lbs. The moment load is carried through by the undamaged flanges and there fore is not a concern
in the analysis. Based on this evaluation the damaged 1-joists remain adequate to support the loading
and will perform their intended function.
Harrison Construction and Consulting Engineers 2244 Colony Rd
Phone (704) 280 -1913 Fax (704) 375 -1867
Mar 05 08 06:22a Georse 9. Harrison (7041 375 -1867 p.3
Pebble Bay — Lot 208
Framing Inspection
Page 2
We appreciate the opportunity to provide you with these services. If you should have any questions,
please feel free to call me at the number provided below.
Sincerely,
W Ge ge A. 'son, P.E.
H 'son Conswction and Consulting Engineers, P.A.
Hanson Construction and Consulting Engineers 2244 Colony Rd
PhoncDN) 280-1913 Fax (704) 375 -1867