1. Pieces of timber which are used to provide structural support for a large item of equipment on a rooftop.
2. Members that form a structural support for a cooling tower or the like, but are not part of the building structure itself.
1. Pieces of timber which are used to provide structural support for a large item of equipment on a rooftop.
2. Members that form a structural support for a cooling tower or the like, but are not part of the building structure itself.