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Home My WebLink AboutDESIGN CALCULATIONS77 Manufacturer of - Work Platforms - Vertical Lifts - Protective Rail Systems - Custom Steel Fabrication Solutions SCANNED BY St. Lucie County WORK PLATFORM SYSTEMS DESIGN CALCULATIONS FOR CVS STORE #4254 (PORT ST LUCIE, FL) Shipping Order # 41809 No. 21938 Ri FEB Z 8<2019 CHAND" P. MANGIA P.� 7423 HOLLOW RIDGE DR. HOUSTON, TX 77095 P.O. Box 89 - Waukesha, Wisconsin 53187 - 262/5494000 - Fax:: 262/549-7703 405 Commerce Street - Waukesha, Wisconsin 53186 Visit us at www.wildeck.com tf Page 2 VS STORE #4254 (PORT ST LUCIE, FL) .of 6 . Specifications Calculations Reference: Manual of steel construction allowable stress design (ASD), Ninth Edition. AISC. Codes: Page Numbers SEA FBC2017-IBC2015 Edition. Compliance with ADA Requirements are not required due to intended use of the work platform. Construction: Non-combustible. Fire rating, if required, is not by Wildeck, Inc. Note: if decking consists of roof deck and plywood, plywood is considered the walking surface or finished product. The roof deck is the structural member that carries the loads and provides the diaphram for the work platform stability. Occupancy.: ' Storage: Not accessible to the general public. Guardrails: 42 inch high, two rail system with a 21 inch maximum pass -through spacing. Handrail: 34-38 inches with a 21 inch maximum pass -through spacing. Welds: . All welds are made using E70XX electrodes. IPP ` ��" Tas r{am ot" VS STORE #4254 (PORT ST LUCIE, FL) Page 3 .of 6 . 2. Deck surface is not by Wildeck, Inc. The deck type and fastening, by others, must continuously brace the compression flange of the framing members and provide the proper diaphram for work platform stabililty. 3. Support columns shall be HSS 5 x 5 x 3/16 structural steel tubing meeting the requirements of ASTM A500, grade B, Fy - 46 ksi or as indicated on drawing. Design is in accordance with AISC specifications. 4. All bolts shall be in accordance with ASTM A325 or A307 at stairs and platforms. 5. All rails for handrail or guardrail at,open ends of work platform and on stairways shall be 1 1/2" O.D. tubing. 6. Bridging shall be 2" x 2" x 1/8" steel angle and CRC 1 1/2" (16 ga.) galvanized steel as indicated on drawing. 7. All material shall be painted with one coat of Wildeck standard paint, see drawings for color. Roof deck underside is painted white, unless galvanized. 8. Column base plate floor anchors shall be Powers concrete anchors, size and type as indicated on drawing, or engineer approved equal. Owner shall advise Wildeck, Inc. of concrete floor thickness. Owner shall advise the installers of any embedded floor obstacles that may interfere with installation of the floor anchors. 9. Erection, if not included in contract, is the responsibility of the owner or dealer and shall be in accordance with manufacturer's specification. 10. Conformance with local codes is the responsibility of the owner. 11. The Wildeck system is designed for 125 PSF live load as specified. 12. Installation drawings and manuals shall be provided by Wildeck, Inc. Wildeck, Inc. CVS Port St Lucie 41809 Stair design conforms to National Association of Architectural Metal Manufacturers (NAAMM), Fourth Edition, 1982 Standard 11" Tread 12 Gauge Tread (Approx. = 1/8") A36 Steel Tread Size = 39" (Actual tread size is 39" - stringer thickness) 39" - (2)(1.5") = 36" Sheet 4 of 6 12" 11-7/8" 1" 1-1 /z"�------lll--- . Treads are welded directly to stringers assume moment frame from tread. Allowable Bending Stress = Fb = 0.6Fy _ (0.6)(36 ksi) = 22 ksi Typical Load = 300# Point Load Bending Stress: M/S = PL/8S = 300#(36") (8)(.126)(1000) 10.71 ksi 10.71 ksi </= 22.32 ksi - - - > OK Deflection = PLA3 192 El = 300#(36")A3 192 E .165 = 0.02 in 0.02in </= 0.10in---->OK 1-1360 = 36" 360 = 0.10 in Wildeck, Inc. CVS Port St Lucie Sheet 5 of 6 41809 Assume all shear to be carried by (2) - 1" welds located on underside of tread 12 Gauge Tread, A36 Steel, Fy = 36 ksi 39" wide Stair Weld is E70 Wire (EE70XX) Shear Stress of Tread = Fv = 0AFy = 0.4(36ksi) = 14.4 ksi Shear Stress of Weld = Fv = 0.3Fy = 0.3(70ksi) = 21 ksi Use lowest Allowable Shear Stress = 14.4 ksi (Tread Controls) Area of Welds = 2 welds*(length of Weld)*(thickness of Steel) = 2(1")(0.105") Av = 0.21 inA2 V of weld = 0.21 inA2 (14.4 ksi) _ = 3.02 kips Actual Load on Weld = ksf*(tread width)*(tread length) 135*11*36 1000*144*2 = 0.19 kips 0.19kips </= 3.02kips --- > OK Wildeck, Inc. CVS Port St Lucie Sheet 6 of 6 41809 StringerCheck Stair 1 M = wl^2 M(all) = Fb(Sx) 8 = 21.6(5.214) _ .135(1.625)(16.566A2) 12 8 = 9.39 K-ft = 6.95 K-ft 6.95 K-ft </= 9.39 K-ft - - - - > OK Deflection = 5wl^4 384E1 = 5(125)(1.625)(16.566A4)(12A3) 384 E 26.07 0.46 in 0.46 in </= 0.55 in ---> OK L/360 = 16.566*02) 360 = 0.55 in (Post is placed V-0" from top end) D • D Plan Review Correction List Comments Project: CVS Store #4254 . Port St. Lucie, FL 41809 Item 1: Please provide drawings for Individual riser and tread dimensions are included on Sheet 1. the stair. Include profile of riser and The treads are 11", and the risers are 6 5/8". These profile tread with dimensions. Include floor to dimensions are included within the overall dimensions. The floor height. Provide details for vertical dimension also includes the height of the stairs at 106". attaching stair to the slab & existing Regarding connection to the existing mezzanine, we added mezzanine. ([A] 107.2.1) stair columns which otherwise would not be necessary. This allows the stairs to be self-supporting, and independent from the existing mezzanine regarding structural support. (2) 7/16" diameter holes were added to the top riser (see Detail "STAIR WELDING DETAIL") for convenience to the installer for connection to the wdsting mezzanine, but these are not load bearing, and provided for serviceability only. These are also redundant, as we provide a 12 Ga. Threshold plate per Detail 2 which connects the stair to the e-dsting mezzanine. Sincerely, Chander P. Nangia, E0muSigned by.- cneeruaErw.azt.. -u� ow�u=o t-^ccno oEnw+� 3ECIMM 0.ogx 14-<tE� r _ , I �= 61RMER A Ag AMLE STATF5IFA6 T" 4b' LL= A STARE LT" RD WOlR WLL q STAIR WELDING DETAIL tread (11") and riser (6- 5/8'. P.O.Box89 (Typical configuration on Sheet 1. Vlaukesha. W1 53187-0089 252-548&4000 800-325-8.38 FAX 3 .wlldeck .wildack FILON�xom