| 摘要 |
A system of structural members comprising a basic structural member having secured to opposite sides thereof a pair of corresponding plates which extend outwardly from the sides of the basic structural member, and are adapted to enable two secondary structural members to be secured thereto by means of releasable fasteners, and at least one further structural member having an end provided with two opposite recesses shaped to allow said end to fit between the plates with heads of any fasteners abutting the plates on the insides thereof located in the recesses, this end further having a flange for securing it to the basic structural member.
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