1927 Mary Street FOUN24-0001 - Engineering ES_1green Guilding Oesian
Engineering ! Project Management I Inspections
(904) 504-6014
1301 Riverplace Boulevard Suite 800
Jacksonville, FL 32207
www. greenbuildingdesign.com
Certificate of Authorization Number 28891
Donald A. Boggs, PE
Florida PE 31054
(904) 504-6014
donggreenbuildingdesi 7n.com
Foundation Stabilization,,,,,,,,111""""'»-,,,,,,,,
Miller Residence '`�,� A gG�'G�,'%
1927 Mary Street o
Atlantic Beach, FL 32233
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December 28, 2023 . * �� P�(v—
Mr. Tony Brown 9 ''•. •`•• ���,`
Ram Jack Foundation Solutions ✓r0 «IIIk411��„``,,,
14403 North Main Street
Jacksonville, FL 32218
Dear Mr. Brown:
I have reviewed the settlement issue at 1927 Mary Street, Atlantic Beach, FL 32233 and have the
following comments:
The structure is a two-story wood frame townhouse, with vertical sheet and horizontal lap
siding, built in 1999.
2. The floor is a concrete slab on fill.
3. The foundation supporting the perimeter walls is a reinforced concrete footing.
4. The southeast corner of the townhouse and screen porch are showing signs of settlement.
S. There is a crack in the concrete footing, along the east end of the south wall of the
townhouse, due to settlement. (see photos)
6. There is a crack in the interior wall, stemming from the upper corner of the closet
door frame of the back bedroom, due to settlement. (see photos)
7. Measurements taken along the southeast corner of the townhouse indicate settlement as
much as 1.8 inches below the original finished floor.
Ram Jack Foundation Solutions
Foundation Stabilization
1927 Mary Street
Page Two
8. The cause of the settlement is unknown, but most likely due to a combination of soil erosion
and decomposing organics in the supporting soil.
9, Soil borings were not taken.
10. It is likely that the settlement will continue to occur unless the foundation is stabilized by
adding supplemental supports.
11. To stabilize the foundation with supplemental supports, we recommend installing (3) three
inch helical piles along the east end of the south wall, (1) three inch helical pile along the
south end of the east wall, and (1) three inch helical pile along the south end of the east
wall of the screen porch, for a total of (5) three inch helical piles, as shown on the attached
sketch.
12. To provide additional support to the southeast corner of the screen porch, we recommend
installing an L 3 x 3 x 318 x 3.0' Spreader Angle between the helical pile bracket and
bottom of the concrete slab as shown on the attached sketch.
13. Each helical pile shall be up to 14 feet long using low profile brackets and spaced a
maximum of 8.0 feet as shown on the attached sketch.
14. Helical pile length shall be based on achieving the installation pressure and torque to
achieve ultimate capacity required.
15. The maximum load on any of the helical piles is 11,160 pounds.
16. The helical piles shall be 2-718" with a 10" and 12" helix and an ultimate capacity of 26,084
pounds when installed with a torque of 2,898 ft. -lbs and a pressure of 1,000 psi.
17. The design is based on the Florida Building (Residential) Code, 81 Edition (2023).
If you need additional information or have any questions, please call
Digitally signed
Donald byDonald A
Boggs
A Boggs Date: 2023.12.29
13:22:08 -05'00'
Respect lly,
Dona A. Boggs, PE
FL PE 31054
This letter has been digitally signed and sealed by Donald A. Boggs, PE 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.
Attachments: Sketch, Photos, and Torque Chart and Helical Pile Specs
December 27, 2023
Green 6Building Design
Engineering ! Project Management I Inspections
(904)370-3001
1301 Riverplace Boulevard Suite 800
Jacksonville, FL 32207
www.greenbuildingdesign.com
Certificate of Authorization Number 28891
Foundation Stabilization
Miller Residence
1927 Mary Street
Atlantic Beach, FL 32233
Donald A. Boggs, PE
Florida PE 31054
don ,reenbtiildin ,desi rn.com
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0 3" Helical Piles up to 14 feet long (5 Required). Maximum spacing is 8.0 feet.
- L 3 x 3 x 38 x 4.0 feet long (1 Required)
green wilding (Design
Engineering j Project Management I lnspections
(904)370-3001
1301 Riverplace Boulevard Suite 800
Jacksonville, FL 32207
www.greenbuildingdesign.com
Certificate of Authorization Number 28891
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Photos — Miller Residence — 1927 Mary Street, Atlantic Beach, FL 32233
Front of townhouse, looking east. Townhouse on right.
2023 JAXGIS Aerial Photo
Photos -1927 Mary Street
i
AXGIS Property Map
Photos —1927 M
Crack in the interior wall, stemming from the upper corner of a closet door frame of the back bedroom, due to settlement.
Oreenl,-vuflding Design
Engineering I Project Management I inspections
(904)370-3001
1301 Riverplace Boulevard Suite 800
Jacksonville, FL 32207
www.greenbuildingdesign.com
Certificate of Authorization Number 28891
Torque Chart and Helical Piles Specs
Miller Residence -1927 Mary Street, Atlantic Beach, FL 32233
HELICAL DRIVER TORQUE CHART
Eskridge 7K
Dealer:
Ram Jack Systems Distribution, LLC
13655 County Road 1570
Ada, OK 74820
Hydraulic_ Motor:
Model: Eskridge Model 54-25
Displacement (W): 10.6
Gear Drive :
Model: Code 135 - Nichols 111A106ASOF
Ratio : 25.53
,9RAMJACK
rPressure*displacernen
T- [ Gear Ratio* *
247t n iaiatac� gear
Pressure = hydraulic pressure (psi)
displacement = hydraulic motor displacement (in 2)
R motor = motor efficiency
I Dear = gear drive efficiency
Torque Chart
Pressure (psi) 1 5001 7601 1,000 1 1,2501 1,5001 1,750 1 2,000 1 2,250 1 2,500 1 2,7507 1 3,000
Torque(ft-lbs) 1 1,449 1 2.174 1 2,898 1 3,823 1 4,347 1 5,072 1 5.797 1 6,521 1 7,246 1 7,970 1 8,695
W1#1140
Iiia torque ran also be calculated at any hydrae is pressurc by muitiplying the pressure by the psiltr rgrto factor for chis
heliaddriverwhich it Lj%.
ultimate CaoacitV1.43
2 3/8" dia. shaft (K, = 10)
14,491
21,737
28,983
36,228
40,WG
2 7/8" dia. shaft (K, a 9)
13,042
7.9,563
26,084
32,605
39,127 45,648
52,169 58,690
65,211 71,732 1 73,800'
31/2" dia. shaft (K, - 7)
10,144
15,2161
20,288
25,360
30,432 35,504
40,576 45,648
50,720 55,792 1 60,864
*NOTE: I) Ultimate Capaeitv() j = Installation Torque (7)x Torque Correlation Factor(K,).
1) Capacities shown [n table assunwK rhe pile. be fully hraced and has no eccentric loading.
3) A safetyfactor 0f 2 should be appifed to tha ultimate wpacity to obtain the working 10041 Capacity,
4) Torque realingfor 2 318"pile it 4,000 ft lbs (I,380psi).
5) Torque rating for 2 718'.pile is 8,200ft-lbs (2,830 psi),
6) Manufacturer recommendation not to exceed 2,500 PSI.
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Torque Chart and Helical Pile Specs —1927 Mary Street
2 7/8" DIAMETER
HELICAL PILE
Upset Connection
Primary Applications
• Ram Jack's 2 7/8" external connection helical lead sections can be used in either tension or
compression. Rare Jack's most economic connection
• Can be used for new construction, remedial repair or tieback applications with all brackets with a 3 1/2"
diameter bracket or external sleeve
• Not recommended for brackets requiring a long external sleeve due to the upset ends and thru bolt connection
• Maximum uttimate compression strength is 54 kips. Recommended allowable loads should be limited to 27
kips for axial load (non -eccentric) pile. Maximum torque is 6,000 ft -lbs,
• Al recommended allowable loads assume proper helix configurations and torque required for soil conditions is
achieved.
Features/Benefits
• One end of each piling is upset so the non -upset and of an adjoining piling section wilf insert into it
• Piles can be loaded same day as installed. No more waiting days or weeks for concrete to cure
• Lead sections come in a variety of lengihs for flexibility in installation
• Helices are available in specialty configurations and 1/2" blade thicknesses
• Thermoplastic polymer powder coated
Materials/Parts
• Helical Blades — minimum Fy 50 ksi
• 2 7/8" O.D. pipe — minimum Fy of 65 ksi
• (2) 3/4" thru bolts
MAX TORQUE STRENGTH - B4OGO FT -LB
ULTIMATE CAPACITY FENS/COMPj - 54 KIP -
ALLOWABLE CAPACITY 9F_NS,1C0MPj - 27 KIP..
BASED ON A TORQUE FACTOR (KO = 9
"W1 SAFETY FACTOR OF 2 BUNG APPLIED GAPACMES
ASSUME PILES ARE FULLY BRACED WITH NO
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Torque Chart and Helical Pile Specs —1927 Mary Street
DIAMETER2 7/811
ThreadedHELICAL PILE
Connection
Primary Applications
+ Ram Jacks 2 7/8' helical load sedons can be usad in either tension or compression due to its unique internal
threaded connection.
• Can be used with all braclkets with a 3 112" diameter bracket or guide sleeve.
• Maximum ultimate compression Strength is 73.8 kips. Recommended allowable bads should be limited to 36.8
kips for axial load (non-eocentric) pile. Maximum torque is 8,200 ft -lbs.
• All recommended allowable loads assume proper helix configurations and torque required for soil conditions is
achieved.
FeaturesfBenefft
• Piles can be loaded same day as installed, No more waiting days or weeks for concrete to cure
• Internal threaded connection makes a smooth homogenous pile
• Variable length 31 i2' sloeves can be added to increase pile stiffness & moment capacity
• Lead sections came in a variety of lengths for flexibility in installation
• Helices are availabile in specialty configurations and 112" blade thicknesses
• Thermoplastic polymer powder coated
• Codes: 2006, 2009, 2®12, and 2015 IBC per ESR -1854 cc
Materials/Parts (f`
• Helical Elates - m mum Fy 50 ksi
• 2 718' 0.0pipe mk, imum Fy of 65 ksi
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Torque Chart and Helical Pile Specs — 1927 Mary Street
#4O36.TB
Primary Applications
• Underpinning existing structures where the bottom of the footing is approximately 6" to 10" below grade with
Ram Jack's 2 7/8" diameter driven pile system with a 3 112" guide sleeve.
• Bracket can also be used with 3 1/2" diameter helical piles or 2 7/8' diameter helical pile w/ 3 1/2" guide sleeve.
Features/Benefits
• 64.0 kip ultimate capacity with proper installation (`Assumes minimum 5'-0 unbraced length per section
1810.2.1 of 2009 IBC) 32.0 K Allowable -Helical and Driven Pile
• The low profile of the bracket helps keep the bracket from being exposed above grade
► Has a 6" vertical plate with (2) 5/8" diameter holes which allows the bracket to be attached to the foundation
► There is 3" from top of bracket sleeve to seat
• An independent 3 112" diameter guide sleeve length designed based on maximum pile load, moment and soil
conditions (4'-0 standard)
• No welding required for installation
• Easily adjusts foundation elevation
• Thermoplastic polymer powder coated
• Can be attached to face of grade bearn/faoting with 112' diameter concrete anchors (not included)
• Codes. 2006, 2005, 2012, and 2015 IRC per ESR -1854
Materials/Parts
• Steel plates - minimum FY of 50 ksi
• 4 1/2" O.D. bracket sleeve, minimum Fy of fib ksi 1CC
• Two (2) 1" diameter all -thread bolts with nuts (ASTM -A36) Ei
• One (1) support strap
Additional Pile Assembly Items
Hydraulically Driven Pile Capacity per IGC -ES & ESR -1854
• 3 1/2" O.D. guide sleeve (Ref. page 71) with 5'-0 untraced length
• 2 7/8' 0.D. driven steel pilings (Ref. page 67) . 32k Allowable -Helical & Driven
• Driven Pile Starter (Ref. page 69-70)