A blocking system or backing system for stud buildings provides expandable and retractable backing spans for placement and fitting between the studs. Each backing span is composed of multiple elements including a first backing element having a stud face for abutting against the web or wider dimension of a stud, and a second backing element for bearing against the first backing element. The first and second backing elements are formed with complementary bearing surfaces and are movable relative to each other with a component of motion in the lateral direc...
A blocking system for metal stud buildings providing wall backing spans for support of wall-mounted fixtures between the metal wall studs comprising: a plurality of expandable and retractable backing spans for placement and fitting between the studs, said backing spans being expandable and retractable for spanning variable spacing between the studs; each backing span comprising a first backing element having a stud face for abutting against a web of a stud, and a second backing element for bearing against the first backing element, said first and second ...
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