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This common offers requisites for the layout of guyed and self-supporting latticed metal electric transmission buildings. the necessities are appropriate for hot-rolled and cold-formed metal shapes. research ideas are defined for the geometrical configurations at the moment in use. approaches for the layout of person individuals mirror huge adventure and attempt info on steels with yield issues as much as sixty five ksi. Connection layout techniques let the engineer to compare connection strength to the main compatible finish and side distances for detailing. If full-scale constitution checking out is needed, methods are defined to aid in acquiring severe info. layout methods disguise structural metal individuals and connections utilized in foundations. The observation presents helping history facts.

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Additional resources for Design of Latticed Steel Transmission Structures (ASCE 10-97)

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14-1 is not difficult to use, S T D - A S C E L O - E N G L 1 4 9 7 0 0 7 5 9 b 0 0 O033058 9 4 4 = COMMENTARY and it has the advantage of giving more accurate values of the buckling stress. There are no established limits of deflection for beams in transmission tower applications. 6 Singly Symmetric I and T Sections The approximate procedures for T sections and singly symmetric I sections give very good results. 7 Other Singly Symmetric Open Sections The formulas in this section are expressed in different terms from those in the AISI specification.

12-1 account for the increase in the moments M, and Mydue to the eccentricity of the compression force P caused by the bending of the member. If the axial force is tension, however, its effect decreases the moments. Therefore, the inclusion of terms in Eq. 13-1 for decreasing the moments would be logical. This is not usually done, however, and the resulting simpler formula is used in this Standard. 14. Therefore, the effects of lat36 eral buckling for members not supported laterally are taken into account even though the lateral-buckling moment is based on a compressive stress.

When tension-only members are subjected to compressive forces they bow out-of-plane without permanent set and the compressive forces are redistributed to other members of the structural system. Upon removal of the applied compressive load the tension-only member returns to its original position. Experience has shown that maintaining or limiting U r of 300 or greater accomplishes the desired performance. In special cases based on structure geometry and loads some tension-hanger members may not be subjected to compressive forces.

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