just some general knowledge (which I have discovered isn't so general!). So I wasn't fishing for "free engineering". The closer I can get to a "correct" design and call-out the least amount of time and effort it'll take the experts to change. For 3, 4, 5 and 6 the development length is For 7 and larger bars the development length is 25.4.2. My question here is for my own education, the work I've done is already out the door (where I used the 30x dia.s). And I'm sure you'll agree it's easier to change something that is existing rather then start something from scratch. 1(a)), the owner’s inspector rejected the placement because the laps did not comply with Section 25.5.4.1(a) of ACI 318-19. After we placed the specified plain welded wire reinforcement (WWR) with a one-square lap (Fig. I take my best shot at it, BUT I point out to my bosses that my work needs to be checked by someone that KNOWS WHAT THEY ARE DOING!!!. We recently completed a slab-on-ground project. material procurement, estimating, Xerox machine repair, AND civil and structural design. I now work for a small engineering firm where I'm pressed to cover other bases. The 2015 IBC permits a 72-bar-diameter cap on SD lap splice lengths. Contact lap splices are usually specified because the likelihood that the bars will displace they do not exceed the maximum spacing defined in Section during concrete placement is much smaller than that for 25.5.1.3 (ACI 318-14 and ACI 318-19), will perform as well noncontact splices (p. The lap splice lengths calcu-lated by this equation are dependent on the bar diameter and the stress in the reinforcement. Section 12.15.2 of CAI318:08 specifies tension lap splice condition. The other half of the beams were designed with a lap splice length slightly exceeding that recommended by ACI 318-19 they failed by rebar yielding and. Oregon Residential Code 2018 > 4 Foundations > R403 Footings > R403.1 General > R403.1.3 Footing and Stem Wall Reinforcing in Seismic Design Categories D 0, D 1, and D 2 > R403.1.3.5 Reinforcement > R403.1.3.5.4 Lap Splices. ACI 318:08 provisions for lap length Lap length in tension Section 12.15.1 of the ACI 318:08 specifies the tension lap lengths for class A and class B splice as 1.0ld and 1.3ld respectively but not less than 300 mm. This equa-tion was originally printed in the Uniform Building Code. Where splices are necessary in reinforcement, the length of lap splice. BUT I'm better then a "monkey see monkey do draftsman". determination of lap splice lengths for ASD for No. Now I'm the first one to point out I am not expert in these other disciplines!. During that time I've had to "bump" up against other disciplines and got to get a "feel" for what they do and how. To explain, my discipline is process piping. 8-11 in ACI 530 mentions primarily compression & tension.I appreciate all the input here!. Lap splice lengths should comply with Table 9. I am just trying to determine/verify the required lap splice length need to for the dowels into the proposed CMU wall based on shear. Lap splices, or full mechanical or welded splices can be used to splice spiral reinforcement. The calculations have been done and the dowel/anchorage system works for the applied shear loads. We will be using rebar and an adhesive anchor to dowel into the existing top & bottom slabs. So the rebar were designed using an adhesive anchorage system. Be careful about corrosion potentials and this is probably your best bet. Top of wall may be a challenge, though, since the top of the culvert is already in place.Ģ) Determine the shear friction required, and fully develop the bar size required to get the shear capacity you need.ģ) Try to design the rebar like an adhesive anchor.Ĥ) Use stainless steel or aluminum angles anchored in the culvert and the wall. 1) Does the shear demand exceed the shear capacity of the mortar in the bed joints? If no, then you don't need rebar passing through that interface.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |