Discuss:
1. Experimental vs. theoretical values for the horizontalreactions.
2. A UDL is the most significant contribution to the horizontalreaction. This is mainly
because of the weight of the road deck of a bridge.
3. What is the relationship between the rise (r) and the horizontalreaction?
4. Discuss: a three-pinned arch is ideal for sites where theabutments are likely to
settle. Obviously, the shape of the arch has no bearing on thehorizontal reaction
(given the same span and rise)
