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  • Users: tmschrader
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  1. tmschrader

    ASD to LRFD and Ultra high strength steels

    Hello According to several sources ASD and LRFD method will come up with eqivalent beams if DL= 3 x LL. If DL<3 x LL than LRFD will give larger strength sections. Does anyone know if this relation is effected by Ultra high strength ateel with a Yield of 100KSI and ultimate stress that is only...
  2. tmschrader

    Crane Outrigger loads

    Hello Ia anyone here involved with calculating max possible loads on outriggers given the CG of crane and loads? Or know a consultant that does? Not the pressure loads on the soil but the actual rating for each outrigger. Most of the articles I found assume a very rigid crane and do not...
  3. tmschrader

    AISC's Reduced Allowables for High b/t ratios

    Hello If b/t ratios are larger then those in the various sections of 1.9 then a appendix must be used to reduce the allowables. I have been checking older editions 7 and 9. In edition 7 the formula is on page 5-115 to 117. Does the more recent AISC appendix or any other code document Allow...
  4. tmschrader

    Conveyor programs

    Hello is anyone familiar with or can recomend some of the more economical conveyor programs. Several are available for under 300 to 50$. You can spend several grand Working on s telescopic conveyor for concrete so have to look at a variety of conditions
  5. tmschrader

    100 ksi yield Tubing sources

    Hello I'm looking for some 8 by 8 by quarter inch or more, 100 KSI yield tubing. SSAB.com has some. But I think it's European Steel . I wasn't even sure it existed. It has an ultimate strength of 108 KSI. Very close to the yield. My older aisc book only covers up to 50 KSI. I don't think the...
  6. tmschrader

    expired License

    Hello, Does anyone know if it is legal or illegal to use a a release version of Autocad after it has expired? For example, say a company decided not to get the new 2010 or 2011 upgrade after the 2007 version dies or is no longer upgradeable, is it illegal to still use the 2007 version? By using...
  7. tmschrader

    ALUM WELD BEVEL, 60 OR 45 DEGREES

    Hello The AWS D1.2 calls out 60 degree bevels (either single or double V) on most or all of the Recommended CJP Joints in the back of the spec. And this is how we qualified our welds for the Qualifictaion and procedure tests for AWS. But we can prep the metal much faster by doing a 45 deg weld...
  8. tmschrader

    WPS for ALUMINUM

    Looking for WPS for aluminum that have proven to pass the AWS bend tests. Specifically we are welding 5083-(H116? not at work) 3/8 and 1", but any WPS close will do. The AWS does not have them like they do for steel. The details in their appendix of AWS 1.2 are very generic and do not spell...
  9. tmschrader

    SELF tapping stainlessoval head 5/16

    Anyone have a stock source for above, #14 and 1/4 are the largest readily found?
  10. tmschrader

    Ultimate Bearing Strength Stainless

    Does stainless have any published values on ultimate bearing strength, which can be higher than tensile strength? Could not find here or on net. For example aluminum 5083-H321 has ult TS/yield= 44 Ksi/31ksi and ultimate bearing strength/bearing yield = 84ksi/53ksi. per published data from the...
  11. tmschrader

    Bend R alum 6061-T6

    Does anyone have another bend radius chart for aluminim. Looking for safe bend radius for 3/8 6060-T6. The chart in the back of the Reynolds alum catolog lists 4 1/2x thickness for 90 deg bend, for 6061-t6, but I would like a second source before we buy the tooling/dies. Is R=1.6875 seem to...
  12. tmschrader

    shear loads on countersunk screws

    The shear (single) load capacity of a countersunk screws should consider the bending caused by part of the bearing surface being at a angle. The loads can really reduce thier capacity, when compared to non csk heads, from what I have seen. Are there any references on this topic so I can back...
  13. tmschrader

    BOLT or PIN Bending

    Any body have a good REf/Web site on the above. Roarke? The thickness of the plate can easily make bending predominant over shear and testing proves this. The evenly distributed load method is OK for conservative design, but failure testing of davit prototypes I've been working with show...

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