[LoneRangerMassachusetts]

To maintain an even load on the bridge supports during construction This premise is flawed. Bridges and buildings are designed for multiple loading patterns to find the that which causes the most critical stress in members. No engineer expects any structure to simply carry an "even" load. By the way, the jargon commonly calls this a uniform load. Other statements in the article point to an ignorant author attempting to speculate about a problem beyond his capability.

[theFIRMbss]

Here's an interesting
"blog" from a scientist who
suggests a new way

to design bridges.
It's a little off-topic,
but it's a fun read:

The Space of All Possible Bridge Shapes, August 3, 2007   Stephen Wolfram