A-frame headgear

From WebRef.org
Jump to navigationJump to search

A steel headgear consisting of two heavy plate A-frames, set astride the shaft mouth. They are braced together and carry the heavy girders that support the winding sheaves platform. It is a completely self-supporting and rigid structure that leaves usable space around the shaft collar and includes a guide-tower structure built over the shaft collar. A number of these headgears have been erected in the Republic of South Africa. Nelson
Source: Dictionary of Mining, Mineral, and Related Terms


Sponsor: Dragon Professional Individual is Here!