HomeMy WebLinkAboutSIGN LTR HELIC ESSI AUTIN RES 7100 LORRAINE CT PSL CEGNutting
E Engineers
of Florida Inc. I Established 1967
Your Project is Our Commitment
October 26, 2020
Mr. Scott Synakowski
Eastern Structural Services, Inc.
4851 SE 128`h Avenue
Geotechnical & Construction Materials
Engineering, Testing, & Inspection
Environmental Services
Offices throughout the state of Florida
www.nuttingengineers.com info@nuttingengineers.com
Okeechobee, Florida 34975
Phone: 772.349.5507 Email: estructuralservices.com
Subject: Report of Helical Pier Installation Monitoring
Proposed Autin Residence Repairs
7100 Lorraine Court
Port St. Lucie, Florida
Dear Mr. Synakowski:
Nutting Engineers of Florida, Inc. (NE) has completed the observation of the helical pier installation
operations at the above referenced site in Port St. Lucie, Florida.
Eastern Structural Services, Inc. (ESSI) installed 15 piers on October 20, 2020. We note that pier 11 was
not installed due to access issues and utilities around the existing A/C unit. The piers size and depth
anticipation were based upon our review of prior boring log information by AMEC dated January 11,
2013 performed in the area and the structural engineer recommendations.
The installation characteristics of each pier are presented in the attached Helical Pier Installation Data.
Identification of each pier location followed by the pier number are shown on the Helical Pier Location
Plans attached. Each pier record in the attached summary tables shows the following information:
■ RECORD NUMBER IN CHRONOLOGICAL ORDER
■ THE HELICAL PIER NUMBER
(AS FOUND ON ATTACHED PLANS)
■ LENGTH OF PIER FROM GROUND SURFACE TO TIP
■ THE INSTALLATION TIME
■ THE DATE OF INSTALLATION
■ THE HELICAL PIER TYPES
■ AND GENERAL COMMENTS AS NEEDED
The piers were designed for an allowable compressive capacity of 10 tons as indicated on the structural
plans. The helical piers were installed to depths of twenty-seven to forty feet below the existing ground
surface where torque conditions or refusal on the hard limestone formation. The drilling operations were
monitored in the field by our field inspector in order to approximately evaluate the type of material being
penetrated.
1310 Neptune Drive • Boynton Beach, Florida 33426 • (561) 736-4900 • Fax (561) 737-9975
Broward (954) 941-8700 • Port St. Lucie (772) 408-1050 • Miami Dade (305) 624-0060
The piers achieved their design capacity based on a predetermined hydraulic pressure amount indicated
on a ft-lbs guage observed in the field during installation or refusal on the limestone formation, whichever
occurred first. The piers consisted of a lead seven, which was a 2-7/8-inch round shaft with one 10-inch
helix at the tip, one 12-inch helix at thirty inches from the tip, and one 14-inch helix at sixty inches from
the tip. The helices were attached at the first shaft and additional five or seven foot, 2-7/8-inch diameter
round shafts with no helixes were added to the pier until capacity was achieved.
Upon completion of this inspection process, and review of the recorded data, it is our opinion that the
helical piers installed at this time attained the required design compressive capacity of 10 tons for the
proposed construction. The piers were also constructed in compliance with the plans and specifications.
We note that it was monitored and ensured that the piers began installation at the survey locations provided
in the field. If during drilling operations it was discovered that gross deviations from original locations
have occurred, the deviation was attempted to be rectified. Nutting Engineers is not responsible for minor
deviations, which have occurred during installation operations, along with incorrect surveyed pier
locations during pier installation. This condition is beyond the control of the site inspector and
undersigned engineer.
Our client for this geotechnical evaluation was:
Mr. Scott Synakowski
Eastern Structural Services, Inc.
4851 SE 128th Avenue
Okeechobee, Florida 34975
NE shall bear no liability for the implementation of recommended inspection and testing services as
described in this report if implemented by others. NE has no ability to verify the completeness, accuracy
or proper technique of such procedures if performed by others.
The Geotechnical Engineer warrants that the findings, recommendations, specifications, or professional
advice contained herein, have been presented after being prepared in accordance with general accepted
professional practice in the field of foundation engineering, soil mechanics and engineering geology. No
other warranties are implied or expressed.
We appreciate the opportunity to provide these services for you. If you should have any questions, or if
we can be of any further assistance in this matter, please feel free to contact us.
Respectfully Submitted,
NUTTING ENGINEERS OF FLORIDA, INC.
Christopher E. Gworek, P.E. #69947
Senior Geotechnical Engineer
Attachments: Pier Location Plan
Pier Installation Records
LTR RELIC ESSI AUTIN RES 7100 LORRAINE CT PSL CEG
Nutting
E Engineers
of Florida Inc. I Established 1967
Your Project is Our Commitment
This item has been digitally signed and sealed by Christopher E. Gworek
on the date adjacent to the seal.
Printed copies of this document are not considered signed and sealed
and the signature must be verified on any electronic copies.
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FOUNDATION UNDERPINNING
7100 LORRAINE CT
PORT ST LUCIE, FL 34952
PERMIT PLAN
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HELICAL PIER INSTALLATION RECORDS
Client: Eastern Structural Services, Inc. Date(s): 10/20/2020
Project: Autin Res Repairs, 7100 Larraine Ct., PSL Weather: Sunny
Contractor: Eastern Structural Services, Inc. Required Capacity: 10 Tons
NEF Inspector: Juan Duran Pier Brand: Ideal Manufacturing
Record No.
Pier No.
Final
Depth*
(ft)
Final
Torque (ft-
Ibs)
Equivalent
Allowable
Capacity (tons)
Shaft Lengths
(ft)& Number Used
Notes
1
16
28
4,800
10
1-7', 5-5'
2
15
27
5,500
10
1-7', 4-5'
3
14
29
5,100
10
1-7', 5-5'
4
12
38
4,000
10
4-7', 2-5'
5
13
35
4,400
10
4-7', 2-5'
6
10
32
4,100
10
5-7'
7
9
40
4,000
10
5-7', 1-5'
8
8
30
4,000
10
5-7'
9
7
30
4,700
10
5-7'
10
6
31
4,200
10
4-7', 1-5'
11
5
36
4,400
10
4-7', 2-5'
12
4
28
4,200
10
3-7', 2-5'
13
3
29
4,000
10
1-7', 5-5'
14
2
28
4,000
10
4-7'
15
1
28
4,000
10
4-7'
Helic Shaft Size : 2-7/8" Average Install Time Per Pier: 20 minutes
Helicies Size and Location From Tip: 10" @ tip, 12" @ 30" from tip, 14" @ 60" from tip - 7'
Onsite Torque/Pressure Value to Tonnage Conversion: 10 ton--4,000 ft-Ibs or Spin Out (S.O.) on Rock
Add. Notes: All depths based on adjacent site grades. S/O = Spin out. Pier #11 Not installed (A/C)
ESSI AUTIN RES REPAIRS 7100 LORRAINE CT PSL CEG
Nutting
L
Engineers
of Florida Inc. 1 Established 1967
Your Project is Our Commitment