3813_001STARK
FOUNOATIONS
February 14, 2020
Mr. Cory Myron
R&R Foundation Specialist
3409 McDougall Ave Suite 204
Everett, WA 98201
4001 Main Street, Suite 305
Vancouver WA, 98663
P: 360.566.7343
Re: Special Inspection — 7821 203,d Street SW, Edmonds, Washington
Permit No.: BLDG2019-1476
Dear Cory -
I have performed the special inspection of the installation of the helical anchors per IBC Chapter
17 for the above -referenced project.
Helical Anchor - Installation
The helical anchor used for installation was a 2 7/8" diameter pipe with a 10" diameter helix
configuration. The installation was performed by R&R Foundation Specialist, certified installers
for Piertech products using a MM1 OK drive head.
The maximum axial load requirement for this project is 7,000 lbs working load (14,000 lbs
ultimate). The anchors were driven to depths of 10 — 13 feet with a minimum installation pressure
of 2,000 psi. This results in an ultimate axial capacity of 48,406 lbs, exceeding the required
ultimate load per the design documents.
Summary
Based on my special inspection and structural observation, the helical anchors were installed
according to the engineering design load requirements and according to IBC Chapter 17.
Please give our office a call if you have any questions or need further assistance.
Regards,
J_6�
Daniel Stark, P.E.
Stark Foundations, Inc.
Attachments: Drive Log
Helical Driver Torque Chart
Customer info
Address
Drive head: 10k
0-5
(0
61�r/
2
5-10
10-15
15-20
20-25
25-30
30-35
35-40
40-45
45-50
50-55
55-60
:�60-65
65-70
70-75
75-80
Final Depth_
Pier Data
5 6 7 8 9 10
11 12 13 14.
.LJStOl-nCl nfo,
cl d re
Drive hcad: 10k 1T- 2 3 4
Pier Data
10 11 19 1 �13 14 11;
15-20
20-25
25-30
30-35
35-40
40-45
45-50
50-55
55-60
60-65
70-75
75-80
: ARK
I-- OT UNDATIDNS
4001 Main Street, Suite 305
Vancouver WA, 98663
P: 360.566.7343
Developed In conjunction with the leading Screw Anchor/Pile installers around the world. The only true Anchor Drives available,
designed& manufactured inhouse by Digga, specifically for the rigours of the application. Host machine operates In the most
efficient HP range, minimizing wear & tear, to optimize performance & ensure highest returns.
FEATURES
Compact high torque Digga manufactured gearbox
Lightweight and compact for ease of movement in confined spaces
Fitted with a high efficiency Eaton/Digga geroler hydraulic motor
Over 34 years design and manufacturing experience
1 yr gearbox and lyr motor warranty
TO SUIT.
-Stand an Mini Machines
with ROC 600lbs minimum
- Mini Excavators up to 3.5T
PIK-
rii
11LEJA
" JR
SPEaFICATIONS
OUTPUT SPEED AND TORQUE
MODEL
MM-110K
OUTPUTSPEED
OUTPUT
TORQUE
Theoretical Torque (ft-lbs)
10.478 @ 3,000psi
GPM
RPM
PSI
FT-LB5
Expected Torque-77% efficiency (ft-Ibs)
8,0140 @ 3,000psi
7
6
500
1,746
Max Pressure
3.000p�i @ 18_5gipn�
8
7
1,000
3,493
Max Flow
18_59pm @ 3000psi
9
6
1,500
5,239
Max Horw powv,
33
10
9
2,000
6,985
Pressure ReliefValve
KA
11
10
2,500
8,732
Standard Output Shaft
2-5'Hex Short
12
11
3,00
10,478
MmiritSpeciftations Mini Madline
MIM Exafflawr
13
11
O�erall Weight (Ild,$) ISO
172
14
12
Height (in) 24"
26A"
15
13
Width I in) 24 21
164'
16
14
17
is
16
16
011oll PI-C nd