Specifications (70) �`l\S \ 2)v\ - C c. a l a
J2K Engineering, Inc . y-b887 SE 25th Court Hillsboro, OR 97123-7215 !�(503) 640-6808 www.j2keng.com �
PROJECT NO. : 16 - 019 - A June 6, 2017
PROJECT: Boberg Residence Addition Page 1 of 8
10700 SW North Dakota Street
Tigard, Oregon
"SUPPLEMENTAL" CALCULATIONS
FOR
"Alternate" Holdowns at Kitchen Shear Wall
DESCRIPTION PAGE
"Alternate" Grid B Wall Bracing Evaluation 2
Evaluate Holdown Strap Anchorage 5
NEW Holdown Detail # 5a 8
REVISION
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NOTICE TO USER/REVIEWER:
ENGINEER'S SIGNATURE AND DATE SHOULD BE IN "BLUE" INK, AND SHOULD BE THE ONLY HAND-WRITTEN
INFORMATION ON THIS PAGE. ANY ADDITIONAL MARKINGS, OR DEVIATIONS IN THE INFORMATION
PRESENTED MAY INDICATE UNAUTHORIZED USE OF THESE DOCUMENTS.
(PLEASE REQUEST VERIFICATION FROM J2K ENGINEERING, IF UNCERTAIN)
Our design responsibility is limited to only those specific areas of the structure/project
as presented herein. The attached calculations and construction details were prepared for
the above referenced plans for the ONE-TIME USE at the noted site.
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Project: Job No: 1 G.—0 I 9 —A-
Desription: , Sht.: n of .6 =.
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Shear Wall with SINGLE CENTERED Hole(below header) J2K Engineering, Inc.
C) "NET" Shear Loads on Panels (DL + Lateral)
(Only those shears which control the wall construction have been shown)
RIGHT Side Panels: v5bdnet. (v5bdLATnet+ VDL5ae + VDLb45sum) v5bdnet. _-239-Of
Top Center Panel: va24net := v2abctrLAT va24net. =-181•plf
v2abctrnet. V2abctrLAT+ vDL2ababv v2abctrnet= 111•plf
Bottom Center Panel: vd24net. v2dectrLAT vd24net. _-181•plf
v2dectrnet. v2dectrLAT+ vDL2deblw v2dectrnet. _-163•plf
v4dectrnet. (v4dectrtAT+ vDL4deblw) V4dectrnet. _-199•plf
LEFT Side of Opening: v2bdnet. v2bdLATnet+ VDLbl2sum + vDL2ae v2bdnet. =-120•plf
RIGHT Side of Opening: v4bdnet. v4bdLATnet+ VDL4ae + VDLb45sum v4bdnet. =-174•pif
MAXIMUM Wall sht'g Shear. 239 PLF Shear= 365 PLF (WIND)
7/16"APA-rated struc'I sht'g ...ONE SIDE
Use: Shear Wall #0 /w/8d nails @ 6" o.c. (12" edges)
for ENTIRE wall area.
TENSION loads at CORNERS of opening:
T2bvert Sab'(V2abctrnet-V2ablft) T2bvert=73 lb "NOMINAL"shear at window opening, /
"NO"tension tie is required
T4bvert Sab'(v4abctrnet V4abrite) T4bvert=-138 lb
1
T2dhor S12'[(VlbdIft+ V2bdnet- V1 delft) -V2delft] 2
1
T4dhor S45'(V4bdnet+ v5bdnet—v4derite —v5denet�'2 "NOMINAL" shear at window opening, ./
"NO"tension tie is required
T2dhor =-179 lb T4dhor =-198 lb
3�CP
D) Summation of Wall End Reactions LEFT end reaction, left Ift LFTend left
R R + RLFTend l541 b O
--
RIGHT end reaction, Rright Rrt+ RRTend -right= 1, 4 lb
PROVIDE: Simpson MST48 Strap Tie at ends
of shear wall.
DBL studs required at holdowns.
(See Detail #5a )
(Co -Co- 20 rt.).
PROJECT: R. Boberg Residence Addition JOB No.: 16 -019 -A
PAGE: of 8
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J2K Engineering, Inc .
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DesCription: Page: 5 of: 8
Shear Wall with SINGLE CENTERED Hole(below header) J2K Engineering, Inc.
1:71 -0-- 1 . 7 cwt.=
vlf�wu.sKtt. c.o.te s,
MAIN Level Grid "B" Kitchen Wall V--rw = 17a07-- u0s
1 ,1.1a1-,4 = 4 fib
shear load to wall, FR=868 lb
Wall and Hole Geometry: length of wall Lwi:= 8•ft+ 0•in length of window Lwin:= 2•ft+ 1-in
height of wall Hsi:= 7•ft+ 6•in height of window Hw;n := 3•ft+ 0•in
offset to window centerline Winoff:= 4-ft+ 0•in height to window header Hdr 7•ft+ 2•ir
win
Building dead loadings:
weight of wall Wt:= 10•psf
weight at top wall plate wttop:= 6•ft•15•psf+ H•Wt wtt0p= 165•plf
weight of wall above opening wtabv:= wtop-Wt•Hdr `' abv= 93•plf
weight of wall below opening wtbiw:= Wt•Hdr wtbiw= 72-plf
A) Compute shear loadings from the APPLIED LATERAL Load
1) Reactions at BOTTOM of wall RLFTend =-814 lbRRTend =814 lb
2) "NET" LATERAL shear loads to the sub-diaphragm areas
a)shear loads in the four(4) corner panels: V1abLAT=-83•plf V5abLAT=-83.plf
V1deLAT=-83.plf V5deLAT=-83•plf
b)shear load in panels on EACH side of opening: v = 147•plf
B) Compute Shear Loadings from APPLIED Building DEAD LOADS
1) reaction at ends of wall: Riff=660 lb Rrt=660 lb
2) shear along vertical sides of wall: VDL1ae =88•plf VDL5ae =-88•plf
3) ADDITIONAL Dead Load shear BELOW opening: VDL2debiw= 18•plf VDL4debIw=-18•plf
4) Dead Load Shear Loading ABOVE the opening: vDL2ababv=292.0 vDL4ababv=-292•plf
5) UNIT shears on either side of the opening: VDL2ae =23•plf VDL4ae.:7-- -VDL2ae
6) Interior shears at panel edges:
VDLa12 =-47•plf VDLbl2sum =41plf VDLd12sum = 1•plf VDLe12 = 1•plf
VDLa45 =471plf VDLb45sum =-4•plf VDLd45sum =-1•plf VDLe45 =-1•plf
PROJECT: R. Boberg Residence Addition JOB No.: 16 -019 -A
PAGE: Z of g