a few bridge questions

[Bigsteel]

ok guys thanks for the explanations (nkp,man you can type ) this has all helped alot.and i think im just going to go with a straight bridge and curved trstle spans while making the whole turn itself more shallow.the whole point to this is to break up the consistency i have in my bridges.so far there all wood,but ill atleast use a different design on each one.but now i dont know which design to use.i've done the complicated deck bridge for the mainline. http://www.blackbearcc.com/DBK_HO.htm but i wanted something simpler for the branch above it (there in the same canyon) something like what shamus (god rest his soul) had on his layout here:http://www.all-model-railroading.co.uk/cats/aa20.htm the one in the foreground,but mine would be the span on a portion of a trestle and be built with steel strap and bolts not rope.or even a much smaller version of the bridge supporting his trestle her http://www.badger-creek.co.uk/ill post pics as soon as i can--josh