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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 U f 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 N5 A B Qa; . .acs•, Q A054 `s is , r 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 1 �r ♦ �� ♦�`�/ dip •••..�� Q ••` �C��� 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. AB O� "�•.,,��. N p�.\Gry p 'TSI 0 tJ 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 r_� N7A �:�sarcra r V4 ;.MLxre.Wr� y. � PN WAX —aNrv€ i �c rwxrEav�c�+ -- ` _ -------r, 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 A Bp '' NS ' >0 X054 tA �r S CAb'SfCfit ai 40 '�' ?CM at,uA DFM Isrs F,nEtSpfl TWWAMoBost P.NMF 4FYi"� LEAD _ �F.£nc FA°r€TKi?1 F7i1'4:I+trl'ct 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)