Span arrangement is governed by the nature of obstruction.
Minimum span
length and clearance height are dictated by the requirement of the road, rail
or river beneath.
Typically, the
ratio of span length to deck height above ground may be taken as 3 to achieve
good visual balance.
Other than that,
odd number spans (1/ 3/ 5 spans and so on) give better appearance than even
number spans.
When using precast
beam, constant beam length can be used to standardize the equipment.
0 Comments