ZIMSEC O Level Combined Science Notes: Pier Bridge
- A simple bridge is also known as a span bridge
- It is made up of reinforced concrete and
- it spans across the gap
- It’s maximum possible span (length which it transverses)
- can be increased by building piers (pillars) to support the load
- A pier bridge is supported by piers at the points of maximum stress
- This is done using piers and abutments (at the end points of the bridge)
- A pier bridge can also be improved by tensile reinforcement
- This can be done by adding steel to the concrete at the bottom of the beam where tensile forces are at their greatest
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