Plans C(O -O 7- 7 /'
Q. 3
Sherman Engineering, Inc. (503)230-8876 Ph
3/5 l NE Sandy Blvd. Ste. 100, Portland, DR 972032 (503) 2264745
Fax
CC) FcC-J
MEMORANDUM City of Tigard
Appr• es Plans /
By!/.'A4 Date I ( 4-
TO: Keith Kudrna
Suntel Designs, Inc. ( 4-(
16865 SW Boones Ferry Rd., #103 1
Lake Oswego, OR 97035 OPROFL
(503) 624-0155 fax ts�'1 N ` o
1 8
DATE: November 13, 2013 •ia1 pR
N
FROM: Don P Sherman, PE p v i0. P�
Principal M P s 4
EXPIRES: 61301 �M
RE: 15410 SW°0-k St. REVISION Tigard, OR
NOTE:
This memo is to inform you of our recommendations for changes to the
original truss members. It is our understanding the contractor has installed
the 2x10 rafters as we recommended previously to eliminate the webs of the
trusses for a vaulted ceiling. We understand the inspector is concerned
about the tapered notch at the bottom rafter at the double top plate. We
have reviewed the loading at this location and determined it is capable of
supporting the design loads without any modifications.
Please call if you have any questions. OFFICE COPY
CC: File-Suntel 111313.doc
NEW 2x10 RAFTERS •24"O.G.
---- NEW 2x4 STUDS • 16" O.G.
I/2"GYP.E .FINISH 70 UNDERSIDE
OF NEW RAFTERS
'��,,. EXISTING 2xCEILING JOISTS 01.,DINING RM TO REMAIN
''''''' '''
EXISTING CLG J6T5
TO BE REMOVED
EXISTING 2x4 WALL
TO BE REMOVED -\
VAULTED
KITCHEN
EXISTING EXTERIOR '
STUDS TO REMAIN.
NEW 4xS BLOCKING-
SHERMAN ENGINEERING, INC.
3151 NE SANDY BLVD. STE. 100
Project Date 11/13/13
Description
Location
SHEARCHEKTM FOR NOTCHED WOOD MEMBERS BeamChekTM Software
BeamChek v2007 licensed to: SHERMAN ENGINEERING, INC. Reg# 7992-66413
Member Attributes V
1.5 x 7.25 Douglas Fir-Larch
Net Size Solid Sawn, Rectangular 4 12
NDS Edition = 2005 d I �rP
dn
Load V in lbs. = 542 rd
Fv Reference Value in psi = 180
Wet Use Factor Cm = 1.0
Shear Factor Ch = n/a
Duration of load Cd = 1.15
Tapered Notch
Report
Area @ dn, An = 8.28 sq. in.
Minimum Span= n/a ft Rafter Depth rd = 3.5 in
Tapered Angle= 18.43 degrees Wall Thickness t= 5.5 in.
Rafter Pitch rp= 4 :12 pitch
Adjusted Fv'value= 207.0 psi Notch Length e = 5.18 in.
Critical Minimum fv= 1143 psi Depth Remaining at Notch dn = 5.52 in.
Ratio fv/Fv'= 47.43 % Proposed Actual Notch Depth = 1.73 in.
Notch Status
OK Fv ratio less than 100% 3/4d = Minimum dn=5.44 in.
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