HomeMy WebLinkAboutBLD2019-00506 - 07 DESIGNo o
MEMORANDUM
Jefferson Counly Building Official
Geoff Tapert, P,lJ.
U8t20
I 120, I 130 Beckettt Road, Port Townsend, WA g8368
K.SOUND
ENGINEERING
Freeland, WA 98249
(360)331-3113(o)
(360) 331-71 14 (f)
x-sound@whidbey.com
TO:
FROM:
DATE:
RE:
We provided engineering fcrr this project on 6- 19-19 fbr the approved permit. We have
reviewed the photographs throughout construction and conclutle the wall was constructed
as designed.
Should you have any questions" please feel fiee to give me a call at (360) 33 I .3 I l3.
sL?n-co;oQ
JAtl t 3 2020
6l crc
J16l
JEFFERSON COUNTY DCD
D
o o
MEMORANDUM
Jefferson County Building Official
Geoff Tapeil, P.E.
U8t20
1120,1130 Beckettt Road, Port Townsend, WA 98368
tr.SOUNDENGINEENING
Freeland, WA 98249
(360) 331-31 13 (o)
(360) 331-71 14 (')
x-sound@whidbey.com
't"o:
FROM:
DATE:
RE:
We provided engineeling for this project on 6- t9-19 for the approved permit. We have
reviewed the photograpirs throughout construction and conclutle the wall was constructed
as designed.
Should you have ar:y que.stions. please feel free to give me a call at (360) 331 "31 l3,
?LD n - oo6oh
JAN I 3 2020
JEFFERSON COUNry DCD
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ILUiI'iG PLAN REVIEW
{ ApFRovED As suBMrrrED
APPROVED AS NOTED
REJECTED
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FINIgH CRADE
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IUATER gIDE
9"
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2" tuEEp t-loLEg b' o.c.
RET/.INING UJALL gECTION
Nov I 2 2019
JEFFERSON COUNTY DCD
Before making chenges or revisiti:ts
to the approved plans you must
contact the Bldg Dept 360-379-4450.
ltmt Plans are approved
ciy errorg or omlsalgns.Ailrua hspectlon tn conlo rm&nco*pp!lceble codee end regulaL!crna.
REVIEWED FOR
CODE COMPLIANCE
Date
=o
_lc\
o
._t.r'
EXISTING BE,ACH ELEVATION
l8! I
FILE COPY
)ara
)
Cantilever Retaining Wall Calculations
@ Geoff Tapert, P.E.,2004, All Rights Reserved
Design Assumptions
flc=
fv=
Soil Bearing Capacity, S =
Equivalent Soil Pressure, g =
Soil Weight, w =
Sliding Coefficient, p
Lateral Soil Bearing, Lb =
Wall width. b =
Design d =
Footing Depth, T =
Wall Height, H =
Toe Width, x =
Design Heal Width, y
Project:
Date:
By:
3,000
40
2,000
35
720
0.35
150
8
6.0
10
4.00
6
32
psi
ksi
psf (Table 1804.2)
pcf
pcf
(Table 1804.2)
psf/ft (Table 180a.2)
in
in
in
ft
in
in
in
lbs
Ibs
ft-lbs
ft-lbs
560 ft-lbs
-6 in
Overturning
Sliding
Bearing
Seismic
Min. Cover =
u(avail) -
085f'"bd
f,
200A" _200b(r2)
f{Jv Jv
6/t7 lt9
4.OO foot wall
*/a
1.5 in clr
F.S.
6.86
4.27
2 EE
1.41
1.5 in
6.25 in
Total Footing width, D =
F1 = wyH
F2 = (h^2)sl2 =
Ma(cw) =
Ma (ccw) =
Overturnino
Ma (ccw)*1.5 F.S.=
Ma (ccw) = Ma (cw)
' Ma(cw) = F1(Y/2+b)
yo = 2((Ma(cw)/F1)-b) =
Slidino
Weight of Wall/ft, Fw =
Weight of Soil above Heal, F1 =
Total weight, Ft =
Friction Resistan6s = IrFt
Buried Toe Depth, T =
F3 = T*Lbl(12+3) =
Total Sliding Resistance =
Bearing Capacity
Min D per Soil Bearing Capacity
D=(F.S.)(Fl+Fw)/S
Seismic Lateral
Seismic Importance Factor, I
Seismic Use Group
Site Class
Response Modification Factor, R
Sre = FaSs =
Sos = (2/3)*Sus =
Cs = Sos/(VI)
Seismic Base Shear, V = CsW
Reinforcement - Stem
Mu = 1.4Ma
M" = A"frd
Mn = Mu/0.9
_ A"'fr'
1:7 f'"b
As=
46
1,280
280
2,560
373 (
H
D
tz
-r
879 lbs/ft
1,280 lbs/ft
2,159 lbs/ft
756 lbs
10 in
42 lbs/ft
797 lbs
39 in
#4barat
#4barat
12 in O.C
12 in O.C
#4barat 12 in O.C
200
P^^ = .f, P,'i" =
Ss
S1
Fa
523 ft-lbs
581 ft-lbs
0.42sbf: .
f
0,029 silft
A,{r'n)
A"
l.lJ
1.00
Ao.1o, : PrirA. =
1.00
I
D
3
L.25
0.84
0.26
565
(Table 9.5.2.2)'Zre
lbs/ft < Total Sliding Resistance therefor OK
# 4 bar at 12 in O.C
2
As = 0.196 si/ft
0.5
A:o.8sy,f:b _o "#)'-",1*i*)+
Use #
use #
4 bar at
4 bar at
12 in O.C.
12 in O.C.
Vertical
Horizonta I
Sound Shoreline
6 in O,C.8 in O.C.10 in O.C.12 in O.C.14 in O.C.16 in O.C.
#
0.393
0.613
0.883
t.202
0.294
0.460
0.662
0.902
0.236
0.368
0.530
0.72L
0.196
0.307
0.442
0.601
0.168
0.263
0.378
0.515
0.147
0.230
0.331
0.451
1.70
Area of Steel, As (si/ft)
FILE COPY
a
/-
#4
#6
#7
#8