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  1. onlineeng

    Earth-scraper in Mexico

    Gotta wonder about seismic issues...
  2. onlineeng

    Blast design for roofs

    This link may provide some useful information: http://www.aees.org.au/Proceedings/2007_Papers/07_Remenikov,_Alex.pdf
  3. onlineeng

    Handrail 200 lb. concentrated load, is there a built-in safety factor?

    Thanks, all, for the excellent information. Thanks for the heads-up re fall protection tie-off, a2mfk. Not an issue here, thank goodness. Now, MiketheEngineer's 4-year-old granddaughter sounds like a force of nature that no amount of engineering could protect against.
  4. onlineeng

    Handrail 200 lb. concentrated load, is there a built-in safety factor?

    Lion06, dhengr, wannabeEIT, Ron, spats, JStephen, BAretired, gwynn, Lutfi, and slickdeals: Thanks much... very helpful suggestions and discussion. btw, this particular case is not HVHZ.
  5. onlineeng

    Handrail 200 lb. concentrated load, is there a built-in safety factor?

    Thanks for the response. Can you give me an example using the building code load of 200 lbs. concentrated load? (With 6063-T52 aluminum.)
  6. onlineeng

    Handrail 200 lb. concentrated load, is there a built-in safety factor?

    When designing handrails with the 200 lb. c.l., does the allowable stress need to be divided by 4? Or, can the moment caused by the 200 lb. load be compared to the yield allowable of the material?(Florida, to conform to FBC.) Thanks in advance.
  7. onlineeng

    Force of a 2x4

    Thanks all for the time and thought. Ash060, in this case, you are right, in a sense: the client has no plans to pay US for the testing. Our goal is to assist in the design of shutters that will pass muster when the client pays a testing facility to do the test. Concretemasonry, you are...
  8. onlineeng

    Force of a 2x4

    JStephen, PAStructuralPE, MiketheEngineer: Again -- thanks!
  9. onlineeng

    Force of a 2x4

    In Florida, for the large missile impact test, a 2x4 (between 7' and 9' long), weighing between 9 lbs. and 9.5 lbs., is shot from a cannon and strikes the surface of a hurricane shutter. The distance from the end of the cannon to the hurricane shutter is 9' plus the length of the 2x4. The...
  10. onlineeng

    Welding aluminum for base of guardrail post

    Thanks for the creative thoughts, a2mfk, and thanks for the Thompson Fabricating suggestion, Gumpmaster. We'll probably end up putting some holes in the concrete and securing the posts with grout (with a PVC pipe or bituminous paint barrier). I think your theory about architects who are...
  11. onlineeng

    Welding aluminum for base of guardrail post

    Thanks, Ron, for the good information. Sounds like you're familiar with the exact issues we're grappling with. I'll sleep on this one.
  12. onlineeng

    Welding aluminum for base of guardrail post

    Is there a standard, for example, for a 1/4" weld?
  13. onlineeng

    Welding aluminum for base of guardrail post

    When welding a circular pipe to a flat plate (both 6063-T6), how far from the weld does the material get back to its original strength? Thanks!
  14. onlineeng

    plasters affected by rain and DPC

    Are the walls block or frame?
  15. onlineeng

    Stucco on corrugated steel?

    Thanks for the info, jooferna. Interesting. It sounds like your friend created his own EIFS panels, in a way. He was walking on the edge of acceptable temperatures for application at 6-7C, I believe. Also, ideally, the temperature should have not gone below around 4.5C for 48 hours after...
  16. onlineeng

    Stucco on corrugated steel?

    Thanks for the thought, Preeng1. That was our first thought, too, but the client wanted to go with three-coat.
  17. onlineeng

    Stucco on corrugated steel?

    Thank you for the intelligent responses, a2mfk, Ron, and dhengr.
  18. onlineeng

    Stucco on corrugated steel?

    Wire lath screwed to the ribs of the steel wall, two layers of paper, no other substrate. Weep screed at the bottom. Appropriate control joints. What do you think? Is some additional substrate, such as plywood, necessary? Thanks.

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