Correspondence
09/21/2006 16:16 5972093 CUSTOM BISOLUTIONS PAGE 01/0
SEP 2 1 REM
PAC, F,c J. \ OBTHWEST ENG)<NEERING, INC.
September 07, 2006
City of Tigard
Building Dept.
Re; CiOriel,Woods
SW #22
Dear Sirs,
l have reviewed the design criteria for the above named project with regards to the
change in SW # 22. Enclosed are the new calculations for SW # 22.
SW # 22 is 12.33 ft. long. The force on this wall is 2,132 lb making the shear
(force/length) 173 plf (pounds per lineal foot) and having a hold-down requirement of
only 185 lbs. Under these conditions it was within the parameters to use %s" drywall (on
both sides of the wall) with 6d nailing @ 4" / 8" O.C. on the edges and in the field
respectively, with only 16d nails @ 12" O.C. in the bottom plate to hold down the wall.
Due to the fact that the drywall was not installed as per requirement, there are two
options that would not require shortening the shear-wall. (Shortening the shear-wall
would then significantly change the. shear value and the hold-down requirement)
The first option would be to sheet both sides of the bathroom/laundry-room wall with one
layer of 1/2" drywall and one side of the master closet with 2 layers of '/z" drywall. The
bathroom/laundry room uses 6d nails with 4" and 8" spacing at the edge and field
respectively. The master closet, however requires 7d nails at the same (4" and 8'~
spacing.
The second option would require one side of the wall (on the laundry room/ master closet
side- full length) to be sheeted with 7/16" O.S.B. This would be nailed with 8d nails at
6" and 12" spacing on the edge and in the field respectively.
0 PRC)
If you have any questions please feel free in calling me. C''~ NG .i NEB
Thank X
ORE
k Ellingson, E.
President PC)
CAW0A=AR9RN\04r =1.AOC S E~
4242 Silver Falls Dr. N., Silverton, OR. 97381
ph # (503) 873-3184 fax # (503) 873-3907
P.E. 4 13,676
09/21/2006 16:16 5035972093 CUSTOM BIZ SOLUTIONS PAGE 02/02
HOLDDOWNS
HOLDDOWN EQUATION:
T= (v) (h) (L) - (L)2 (0.5)2 (LtAb) (w) (reduction) (L)2 (0.5) (h) (w„~) stories)
L
S AL S SW22
unit shear, v 173 Ibflineal foot
wall height, h 8 feet
length, L 12.33 feet
joist width, Lbb s 38 feet
load from joists above, w 10 psf
wall weight, w,,,,„ 8.4 psf
controlling load (reduction) wind
# stories 1
REQ'D HOLDDOWN, T= 185 lb
SHEARWALLSCHEDULE
NAILING HOLD-DOWNS ANCHOR LENGTH P08 NOTES
SW # SHEETING EDGEIFIELD SIMPSON
22 1/2" DRYWALL 6d 4" / t;" 16d NAILS 12" O.C. 12.33 1 - 2X NOTE °A"
NOTE A; MUST SHEET ONE SIDE (MASTER CLOSET) WITH 2 LAYERS OF DRYWALL AND BOTH
SIDES OF THE BATHROOWLAUNDRY ROOM WALL(SEE DETAILED LETTER)
OR
SNEARWALL SCHEDULE
NAILING HOLD-DOWNS ANCHOR LENGTH POST NOTES
SW # SHEETING EDGE/FIELD SIMP0 FF
22 7/16" O.S_B 8d 6" / 12" 116dNAIIS@~&17'0.C- 12.33 1 - 2X NOTE "A"
NOTE A: MUST SHEET ONE SIDE (FULL LENGTH) WITH 1 LAYER OF O.S.B.
intex-5plex.xls.xis
ROTH Kory MacGregor
President
HEATING & COOLING
Ventilation for any unit with inadequate ventilation
Roth Heating and Cooling will install a 200 CFM fan which will ventilate the crawl
space.
The crawl space is approximately 1,100 cubic ft. divided by 200 cubic feet per minute.
This fan will change the air out 10 times an hour.
t
X L G a
•
Corporate Headquarters • P.O. Box 1265 • 6990 S. Anderson Road • Canby, Oregon 97013
Ph. 501266.1249 • Fax: 503.266.3478 • CCBF 14008
www.roth-heat.com