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  1. Geometrico

    Good Earthquake Engineering Text

    Anil Chopra's Dynamics of Structures is great. Using it myself now to brush up on the subject after a few years. Page xxxii of the preface has a direct reading path if you are a practicing engineer. Chaptes 1 to 3 give the basic mechanics. Chapters 6 and 7 provide the theory behind response...
  2. Geometrico

    ASCE 7-05 WInd Loads Fig 6-9

    Further to Stillerz's comment, 1) Section 6.5.12.3 states "The MWFRS of buildings of all heights whose wind loads have been determined under the provisions of Sections 6.5.12.2.1 and 6.5.12.2.3 shall be designed for the wind load cases as defined in fig. 6-9." It seems pretty clear that the...
  3. Geometrico

    ASTM A53 Gr A pipe in structural use

    Thanks for your comments, racookpe1978, but they are unconvincing to me. Reading a little more from the black book... The commentary to the specification gives a bit of a clue in that it says "This Spec lists those products/materials that are commonly useful to structural engineers and those...
  4. Geometrico

    ASTM A53 Gr A pipe in structural use

    ASTM A53 Spec for Steel Pipe has both Grade A and Grade B variants, but the Specification for Structural Steel Buildings in AISC Steel Construction Manual 13th edition "approves" only Gr. B "for use under this Specification" (Sect. A3.1a(3) ). The same was true for the 9th ed. Grade A seems to...
  5. Geometrico

    OWSJ KL/r

    Careful! As dgkhan states, you must use the radius of gyration, not the radius of the bar! Also, your formula for the "compressive resistance" doesn't seem right. You need to check again more than your math.
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