Eric,

Concrete and steel bonded together consitute a 'composite'
structure. Steel girders used for bridges have steel
studs welded on top flanges of the girders. The concrete
deck is poured and bonds to the girders with the help
of the numerous studs. The Portland cement in the
concrete is the glue which makes the bonding possible.
So, in a way, the concrete and the steel are 'glued'
to each other. Calculating the strength of the structure
takes the 'composite' structure into account.

Ray Lovinggood
Carrboro, North Carolina, USA

At 02:42 10 September 2003, Eric Greenwell wrote:
In article ,
says...

Same happens as with a wooden glider.......


JJ knows that...after all, wood and fiberglass are
both composite aircraft;-)

Not really. Wood is a material used 'as is', while
composite aircraft
mix at least two materials together; e.g., epoxy and
fiberglass.
Gluing or bolting materials together doesn't qualify
as 'composite'.

You probably knew that...
--
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directly

Eric Greenwell
Richland, WA (USA)