Laserfiche WebLink
C 5FA Design Group, LLr_ <br />®� STRUCTURAL I GEOTECHNICAL I SPECIAL INSPECTIONS <br />PROJECT NO. ISHEET NO. <br />MFR23-236 <br />PROJECT DATE <br />Bankston Residence Underpinning 3/1/2024 <br />SUBJECT BY <br />2.875 in 0 Push Pier System CAF <br />Design Input <br />Pier System Designation = <br />2.875 in 0 <br />Pier Material = <br />Galvanized <br />External Sleeve Material = <br />Galvanized <br />Vertical Load to Pier, PTL = <br />9.199 kips <br />Minimum Installation Depth, L = <br />10.000 ft <br />Unbraced Length, I = <br />1.000 ft <br />Eccentricity, e = <br />4.250 in <br />Friction Factor of Safety, FS = <br />2 <br />Normal Surface Force, Fn = <br />4.599 kips <br />Design Load (Vertical), PDL = <br />9.199 kips <br />Design Moment, MomentPierDL = <br />3.9.095_k_ip-in <br />Sleeve Property Input <br />Sleeve Length = <br />36.000 in <br />Design Sleeve OD = <br />3.444 in <br />Design Wall Thickness = <br />0.192 in <br />r= <br />1.152 in <br />A = <br />1.962 in <br />S = <br />1.512 in <br />Note: Sleeve reduces bending stress on main Z = <br />2.034 in <br />pier from eccentricty <br />I = <br />2.603 in <br />E = <br />29000 ksi <br />Fy = <br />50 ksi <br />(�/PIER/ <br />REACTION <br />(E) WALL FRAMING <br />(E) SLAB <br />PIER CAP WITH I ON GRADE <br />THREADED RODS i <br />j -.•� III <br />III —II <br />• "a:. II —III <br />BRACKET <br />EXCAVATION--, <br />JPier Property Input <br />I :J <br />1= <br />II I I=1I I-1I <br />Design Tube OD = <br />2.827 in <br />—III—I I I <br />Design Wall Thickness = <br />0.141 in <br />III <br />I —III —III <br />k = <br />2.10 <br />1- <br />I IEE I I <br />r = <br />0.951 in <br />in2 <br />III=1 I I�I I I III=1 <br />III —I I�—I I PIER <br />A = <br />Note: Design thickness of pier and sleeve c= <br />1.189 <br />1.413in <br />based on 93% of nominal thickness per AISC S = <br />0.761 in <br />REACTION AT LOAD <br />and the ICC-ES AC358 based on a corrosion <br />Z = <br />1.018 in3 <br />BEARING STRATUM <br />I <br />loss rate of 50 years for zinc -coated steel <br />I = <br />1.075 in' <br />Note: Section above is a general representation of piecing system, refer <br />E = <br />29000 ksi <br />to plan for layout and project specific details. <br />Fy = <br />50 ksi <br />Hyrdraulic Ram Area = <br />9.620 in2 <br />Pier Output Per AISC 360-10 Doubly and Singly Symmetric Members Subject To Flexure and Axial Force <br />kl/r = <br />26.50 <br />OK, <200 §E2 <br />Note: Flexural design capacity Fe = <br />407.406 ksi <br />§(E3-4) <br />based on combined plastic section 4.71 -(E/Fy)-' = <br />113.43 <br />§E3 <br />modulous of pier and sleeve For = <br />47.496 ksi <br />§(E3-2 & E3-3) <br />Pn = <br />56.5 kips <br />§(E3-1) <br />Safety Factor for Compression, 0. = <br />1.67 <br />Allowable Axial Compressive Strength, Pn/O, = <br />33.8 kips <br />§E1 <br />Actual Axial Compressive Demand, Pr = <br />9.199 kips <br />Dhp1ef = <br />20.1 <br />OK, <.45E/Fy §F8 <br />Mn = <br />152.6 kip -in <br />§(F8-1) <br />Safety Factor for Flexure, C)b = <br />1.67 <br />Allowable Flexural Strength, Mnlob = <br />91.4 kip -in <br />§F1 <br />Actual Flexural Demand, Mr = <br />39.1 kip -in <br />Combined Axial & Flexure Check = <br />0.65 <br />OK §(H1-1a & lb) <br />l Results <br />Max Load To Pier = Design Load = 9199 lb <br />2.875" Diameter Pipe Pier with 0.165" Thick Wall <br />3.5"Diameterx36" Long Pipe Sleeve With 0.216"ThickWall <br />Minimum 10'-0" Installation Depth And Minimum 2000 psi Installation Pressure <br />Minimum'/4" Foundation Lift During Installation <br />