Tunnel Construction Codes

Tunnel construction codes supported by Touchstone.

AIR provides the following codes for tunnel construction:

Note:

While Coverage C (content) is not supported for most of the 200-series construction class codes, it is supported for Inland Transit (construction code 259) and for some other construction codes, such as tanks and pipelines. For the full list of supported combinations, refer to the Const. & Occ. Combin. tab in each model supplement. For information about individual model support for the 2000-series codes, see Construction Class Codes -- 2000-Series.


Construction Code	Category	Description
213	Alluvium Tunnels	Tunnels that were drilled through unconsolidated sedimentary deposits and then typically lined with concrete For exposures in South America, use code 2131.
214	Rock Tunnels	Rock tunnels are lined or unlined tunnels that were drilled through rock. For exposures in South America, use 2141.
215	Cut and Cover Tunnels	Tunnels that were constructed by cutting a trench, installing a liner, and then covering the liner with earth.
2131	Alluvium Tunnels	Lined or unlined alluvium tunnels with unknown method of construction.
2132	Alluvial Bored Tunnels	Lined or unlined tunnels constructed through alluvium soil using a boring machine.
2141	Rock Tunnels	Lined or unlined rock tunnels with unknown method of construction
2142	Rock Bored Tunnels	Lined or unlined tunnels drilled through rock using a boring machine.
2150	Unknown Tunnel	Lined or unlined tunnels with unknown material and unknown method of construction, or other tunnels that cannot be mapped to any of the other tunnel construction class codes.
2151	Rock Cut and Cover Tunnels	Lined or unlined rock tunnels constructed after excavating a trench and roofing over with an overhead support system.
2152	Alluvial Cut and Cover Tunnels	Lined or unlined alluvium tunnels constructed after excavating a trench and roofing over with an overhead support system.