threaded fastener 46 the other leg 48 of the first support member 40 extends outwardly from the under structure 44 the first support member 40 has a substantially continuous channel 50 formed on the interior surface of its leg 48 preferably this channel is formed at or near the interior corner formed by the first leg 42 and the other leg 48 this channel 50 is sized and shaped to receive the engaging mean 34 of the panel 22 it is to be noted that this channel may be located at any convenient point along the leg 48 still referring to fig2 an upper joint 24u comprises a second support member 52 being disposed in a substantially continuous array this second support member 52 is formed with a substantially l shaped profile also a first leg 54 is securely fastened to the under structure 44 of the building by an appropriate means such as fastener 46 this second support member 52 is fastened to the under structure in a selectively spaced alignment with the first support member 40 this selective spacing allows for the insertion of a panel substantially as shown the first leg 54 is shown with rib members 56a 56b and 56c integrally formed there on these ribs 56 act as spacers and are used for installation convenience it is anticipated that a standard shim may be used as a spacer under the first leg 54 a second leg 58 of the second support member 52 extends outwardly from the under structure 44 for a predetermined distance a leaf spring 60 is securely fastened to the interior surface of the second leg 58 by a suitable means such as a rivet screw or the like the free end of the leaf spring 60 is oriented to face the.