(57) A method of constructing a modular bridge across a span, comprises deploying a frame
over the back of a launching vehicle (135) on the home bank of the span, placing a
first bridge launching rail (133) module on a support for the launching rail on the
frame, booming out the launching rail as it is formed and placing subsequent launching
rail modules on the launching rail support and coupling them to the launching rail
being formed, landing the far end of the launching rail on the far bank of the span,
placing a first bridge module (75) on the launching rail and on bridge module support
means on the vehicle, launching the bridge along the launching rail as the bridge
is formed and placing subsequent bridge modules (31) on the launching rail and on
the bridge module support means and coupling them to the bridge being formed.
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