Further reading:
A good ladder tutorial on the VDC wiki
Material surface properties (for ladder sounds)
The Source engine is a 3D game engine developed by Valve Corporation. Its unique features include a large degree of modularity and flexibility, an artist-driven, shader-based renderer, accurate lip sync and facial expression technology, and a powerful, efficient and completely network-enabled physics system.
A video tutorial explaining the best methods of creating stairs and ladders for your map.
Posted by hiyougami on - Basic Mapping/Technical
Further reading:
A good ladder tutorial on the VDC wiki
Material surface properties (for ladder sounds)