| AWM Table: | Bridges, Bridge Span |
| Attribute: | Superstructure Material |
| Purpose: | To identify the primary material used in the bridge superstructure, supporting decisions related to maintenance, structural performance, durability, and replacement planning. |
| Value | Description | Photo Example |
|---|---|---|
| Aggregate | Crushed rock or gravel used in combination with cement to form concrete, or as a standalone fill material in some simple structures. |  |
| Armco | Corrugated steel used primarily in culverts or low-span bridges, known for being lightweight and easy to install. |   |
| Concrete | A hard, durable mixture of cement, water, and aggregates, widely used for strong and long-lasting bridge decks and beams. |  |
| Earth | Compacted soil or fill material used in very basic or low-load crossings, such as causeways. |  |
| Gabion | Wire cages filled with rocks, stacked to form a supporting structure, often used for retaining walls or low-level bridges. |  |
| Log | Tree trunks or large timber beams used as simple structural members, often in rural or temporary crossings. |  |
| Masonry | Stone or brick units laid and bound together, typically used in older or traditional bridge structures. |  |
| Polyethylene (PE) | A type of plastic material, lightweight and resistant to chemicals and corrosion, used in modern small bridges or culverts. |  |
| Polyvinyl Chloride (PVC) | A rigid plastic material occasionally used in small or temporary structures due to its resistance to moisture and low cost. |  |
| Steel | Strong metal used for beams, girders, and reinforcement, common in medium to long-span bridges. |  |
| Timber | Processed wood used for beams, decks, or full bridge structures, especially in rural or remote areas. |  |
| Unknown | The material has not been identified or recorded. |
