What does your mom/dad actually do at work? A. Goes and gets coffee and sits at his desk Q. People often ask me what I do for Simpson Strong-Tie and I sometimes laugh about how my son Ryan responded to a questionnaire he filled out that day: Q. We had different activities for the kids to learn about careers and the importance of education in opening up career opportunities. What are your thoughts? Let us know in the comments below.Ī couple of years back we hosted a “Take your daughter or son to work day,” which was a great opportunity for our children to find out what their parents did. The tested load was very close to the maximum calculated capacity for the SDS screws in the connector, so it was a great test result. Failure photo 2 shows a close-up of the pullout failure. If you are curious what happened in that HHGU14 test, the screws pulled out of the header with a load slightly exceeding 101,000 pounds. SDW – Maximum Fastener Spacing from Point Load However, we have found that most loads can be managed by taking advantage of the ⅝” stagger allowance. At first glance, it may appear challenging to fit enough fasteners while meeting the non-staggered row-spacing requirements. In order to ensure load transfer, the SDW screws need to be located relatively close to the connection. Simpson Strong-Tie® Strong-Drive® SDW EWP-Ply Screw – Allowable Loads for Side-Loaded Multi-Ply Assemblies per Screw Designers can use the information to calculate the number of fasteners required for a given point load. Simpson Strong-Tie has created a new engineering letter, L-F-SDWMLTPLY16, which complements the information in the Fastening Systems catalog by providing allowable loads in a single fastener format. While uniform loads are very common, Designers often request additional information to design multi-ply beam connections to transfer concentrated loads. The calculation for the allowable load applied to the outside ply of a multi-ply beam is: of our Fastening Systems catalog, C-F-14 provides allowable uniform load tables for side-loaded multi-ply assemblies using LVL, PSL or LSL material. Allowable Uniform Loads and Spacing Requirements The built-up members must be connected to transfer load from the loaded ply into the other plies. In the field, built-up beams or girders commonly support joists or beams framing into their side. When a built-up beam is loaded concentrically as in the test setup shown, fastening the members is not critical since that giant steel plate will load each ply of the beam. Engineered wood such as laminated veneer lumber (LVL) is often used for its high load capacity and multiple 1¾” plies are built up to get the required capacity for the application. This can be done for several different reasons: for the convenience of handling smaller members on the jobsite, or because solid 4x, 6x or glulam material is not readily available, or for reasons of cost. Larger beams are often built up out of smaller 2x or 1¾” members.
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