The Structural Engineer > Archive > Volume 68 (1990) > Issues > Issue 23 > The Y-Beam: a Replacement for the M-Beam in Beam and Slab Bridge Decks
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The Y-Beam: a Replacement for the M-Beam in Beam and Slab Bridge Decks

The M-beam was introduced in the late 1960s as a replacement for prestressed I-beams in beam and slab construction. Originally conceived for voided slab construction, the M-beam was soon used in contiguous beam and slab and finally in spaced beam and slab construction. The current need for inspection of bridge structures and maintenance of bearings, along with design changes since 1970, has resulted in the M-beam not being a perfect solution for the design configurations in which it is currently used. H.P.J. Taylor, L.A. Clark and C.C. Banks