A W410 × 60 steel beam (see Appendix B) is simply supported at its ends and carries a concentrated load of P = 420 kN at the center of a 6.0-m span. The W410 x 60 shape will be strengthened by adding two cover plates of width b = 230 mm and thickness t = 18 mm to its flanges, as shown. Each cover plate is attached to its flange by pairs of bolts spaced at intervals of s = 250 mm along the beam span. The allowable average shear stress in the bolts is Tallow = 92 MPa, and bending occurs about the z centroidal axis. Determine the minimum required diameter for the bolts. Cover plate W410 x 60 y Cover plate b Determine the moment of inertia lztop of the top cover plate about the z centroidal axis of the cross-section, and the moment of inertia lzbot of the bottom cover plate about the z centroidal axis of the cross-section.
A W410 × 60 steel beam (see Appendix B) is simply supported at its ends and carries a concentrated load of P = 420 kN at the center of a 6.0-m span. The W410 x 60 shape will be strengthened by adding two cover plates of width b = 230 mm and thickness t = 18 mm to its flanges, as shown. Each cover plate is attached to its flange by pairs of bolts spaced at intervals of s = 250 mm along the beam span. The allowable average shear stress in the bolts is Tallow = 92 MPa, and bending occurs about the z centroidal axis. Determine the minimum required diameter for the bolts. Cover plate W410 x 60 y Cover plate b Determine the moment of inertia lztop of the top cover plate about the z centroidal axis of the cross-section, and the moment of inertia lzbot of the bottom cover plate about the z centroidal axis of the cross-section.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:AW410 x 60 steel beam (see Appendix B) is simply supported at its ends and carries a concentrated load of P = 420 kN at the
center of a 6.0-m span. The W410 x 60 shape will be strengthened by adding two cover plates of width b = 230 mm and
thickness t = 18 mm to its flanges, as shown. Each cover plate is attached to its flange by pairs of bolts spaced at intervals of s
= 250 mm along the beam span. The allowable average shear stress in the bolts is Tallow = 92 MPa, and bending occurs about
the z centroidal axis. Determine the minimum required diameter for the bolts.
Cover
plate
W410 x 60
y
Cover
plate
b
Determine the moment of inertia lztop of the top cover plate about the z centroidal axis of the cross-section, and the moment of
inertia lzbot of the bottom cover plate about the z centroidal axis of the cross-section.
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