plate against the clips thereby securing the structural members in this way pressure is applied through the clips 54 to the upper portions of the structural members thereby positively securing the structural members in the junction member and also positively positioning these structural members by pressing the upper flange 25 against the upper surface of the junction member therefore the position of the height of the structural members within the junction member is accurately controlled and a high degree of precision of the junction member beneath the support steel is possible by adjusting the i bolt the plate member 28 has been provided with recessed areas 56 spaced about the periphery of the plate member and inwardly of the junction member relative to a given cell of the grid network these recesses are generally positioned to bisect the right angle between any two structural members and will be spaced outwardly of the junction members a sufficient distance to clear the lower flange of the structural members these recesses are used to receive the legs of a torsion spring used in the securement of the panels beneath the grid network further details of the suspension of the panels can be appreciated from fig3 where.