10724 228th Street SW, Edmonds Special Inspection.pdfSTARK
FOUNDATIONS
August 16, 2019
Mr. Cory Myron
R&R Foundation Specialists
7704 176th Street SE
Snohomish, WA 98296
Re: Special Inspection - 10724 228th Street SW, Edmonds, Washington
Permit No.: BLD20190792
Dear Cory -
f001 Main Street, Suite 305
Vancouver WA, 98663
P: 360.566.7343
I have performed the special inspection of the installation of the helical piers per ICC ESR-3969 for the above -
referenced project.
Helical Pier Installation:
The helical pier used for installation was a 2 7/8 inch diameter pipe with a 10 inch diameter helix configuration.
The installation was performed by R&R Foundation Solutions certified installers for PierTech Products using a
MM-10K drive head.
The maximum axial load requirement for this project is 24000 Ibs ultimate load. The piers were driven to
depths of 10 - 20 feet with a minimum installation pressure of 1500 psi. This results in an ultimate axial
capacity of 47155.5 Ibs, exceeding the required ultimate load per the design documents.
Summary:
Based on my special inspection and structural observation, the helical piers were installed according to the
engineering design load requirements and according to ESR-3969.
Please give our office a call if you have any questions or need further assistance
Reecards. n
1 `�
Daniel Stark. P.E.
Stark Foundations, Inc.
Attachments: Drive Log
RS-6 Torque Chart
i
C�stom�r �nlo
rPier
=MMMMM
1 2 3 4
PierData
9 10 11 12 13 14 15 16
mom
5
�t
6
7
_
8
i '
mmm
MM----
®mmmmmmmmmm
mm
------
------_
■
■
■
■
Final0ep
���®®®®---------
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
• I yr gearbox and 1 yr motor warranty
TO SUIT:
Stand on Mini Machines
with ROC 6001bs minimum
Mini Excavators up to 3.5T
SPECIFICATIONS
MODEL
MM-1 OK
Theoretical Torque (ft-Ibs)
10,478 @ 3,000psi
Expected Torque-77%efficiency (ft-Ibs)
8,040 @ 3,000psi
Max Pressure
3,000psi @ 18.5gpm
Max Flow
18.5gpm @ 3000psi
Max Horse Power
33
Pressure Relief Valve
NA
Standard Output Shaft
2.5"Hex-Short
Mount Specifications
Mini Mach
Overall Weight(lbs)
150
172
Height (in)
24"
26.4"
Width (in)
24.21"
16.4"
1 YEAR
* GEARBO%WARRANTY
1 YEAR
d]ffl
MOTOR WARRANTY
OUTPUT SPEED AND TORQUE
OUTPUTSPEED
OUTPUTTORQUE
GPM
RPM
PSI
FT-LBS
7
6
500
1,746
8
7
1,000
3,493
9
8
1,500
5,239
10
9
2,000
6,985
11
10
2,500
8,732
12
11
3,000
10,478
13
11
14
12
15
13
16
14
17
15
18
16
"Output speed and torque specifications are THEORETICAL. Speed and torque output are dependent on the overall system efficiencies
associated with the prime movers hydraulic system. This document should be used for information and comparative purposes only.