| 摘要 |
<p>A membrane (3) support/spacer-bracket assembly consists of a cold rolled angled cross-section metal support member (2) having a horizontal membrane support surface (21) to which the membrane (3) is secured by self tapping screws, a spacer bracket (4) of sheet metal having an upper portion in non-rotatable engagement with the support member (2) and a lower portion for attachment to a primary structure member (1). A first inwardly directed cup-shaped receiving member (55) is positioned at one end of the support member horizontal surface (21) and a second inwardly directed cup-shaped receiving member (56) is positioned at the end of the leg of the member (24) depending from the other end of the support surface. The bracket upper portion includes inwardly directed slots (49, 50) formed in opposed edges to define tongue portions (40, 52) for engagement in the support member receiving members (55, 56) whereby the bracket is locked into the support member. The bracket (4) further includes an angled anti-rotating element (53) formed at an edge portion to act between the inner side of the support member surface and a point in a receiving member spaced from the corresponding bracket tongue member engaging therein, whereby rotation of the bracket within the support member is prevented. The support member horizontal surface (21) is preferably ribbed, the pitch of the ribs (27) being about 1.1 times the diameter of the self tapping screw thread, the thread engaging the support surface (21) at the base of a rib, the ribbing providing improved screw torque and pull out resistance for a given thickness of metal forming the support member. <IMAGE></p> |
