![]() ![]() The same calculations and software are used to validate the embed plate design.īelow we walk through a typical model and calculation for the EM-BOLT boltable embed plate (Model BEP-2) using HILTI Profis Anchor Software, just like you would for a standard field welded embed plate design. In reality, embed plate design for EM-BOLT boltable embed plates is no different than designing for standard field welded embed plates. fb=M/S if you solve for t you get: t(required) = sqrt((6xM)/WxFb)) = 0.355"įb = Weak axis bending allowable = 0.Engineers and designers who are considering switching to EM-BOLT boltable embed plates from standard field welded embeds are often concerned that their standard embed plate design practices won’t hold. Therefore, the monent M=2x1298x1.75 = 4543 in-lbsĬheck if plate thickness is adequate. The moment arm for the assumed plate is (6"-2.5")/2 = 1.75". The plate bending moment will be 2T x Moment arm. Make sure to take reductions for edge distance and spacing violations if any (Guardrails are usually very close to the edge of conc).Ħ. The shear on the bolts will be 200/2 = 100 lbsĤ. (The 1.2 factor is to account for the plate flexibility - unstiffened plates)ģ. ((6")/2 + (2.5"/2)) = 4.25" (you may add 2x the plate thickness but I would not recommend it unles you really nee it). Horizontal force top of the post = 200 lbsĢ. Assume you have an 8x8 plate 2.5" SQ attachment and 4 bolts with 1" edge distance and 6" bolt spacing. RE: Base Plate Design- Simple Design Lion06 (Structural) 7 Aug 08 11:04Ī quick a calc to check this simple plate is the following:īeacuse I dont have the exact geometry of your plate I would make several assumptions. ![]() Now I know I've really wrapped myself around such a simple problem, and I know my 6圆 plate works, because I've had my boss design it with me when I first started (I'm 2 years in, and I'm just choking right now on this).Īll that is necessary for the triumph of evil is that good men do nothing. But the uplift isn't distributed in the same way, it would seem to be more like a cantilever. Originally, I was just going to treat the plate as a beam from the point of compression on the one side to the bolt, with the tension force as a concentrated load in the center of the plate. I'm having a mental lapse on what is the uplift load on the epoxy bolts, and the forces in the plate. ![]() I am going to weld around the tube with 1/4" weld, which is sufficient to keep the tube connected to the base plate. My moment is 9200 #-in and the uplift at the base of the tube is ~3.6kips. It is 3'10" tall and has a concentrated force of 200#. I have to design a base plate for a post for a handrail and I am anchoring it down to concrete with epoxy bolts. ![]()
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