as seen best in fig2 5 an adjustable connection 20 is provided between the side of the joist 11 and the adjacent side wall sw the adjustable connection comprises a t shaped mounting bracket 21 which is suitably fixed to the side of the bottom chord 13 or 14 with the leg 22 of the bracket extending laterally from the chord toward the adjacent sidewall the bracket is affixed to the chord 13 or 14 at the point where the chord tie 16 extends beneath the chord as seen in fig2 a pair of angularly upwardly and outwardly extending truss members or braces 25 and 26 are connected to the bracket 21 on opposite sides of the leg 22 by means of angle shaped plates 27 and 28 and a bolt 29 extended through the plates and the leg 22 of the bracket this connection enables the truss members 25 and 26 to be pivoted up and down about the bolt 29 increasing or decreasing the horizontal reach of the truss members relative to the adjacent sidewall thus as seen in fig3 the truss members 25 and 26 may be pivoted in a downward direction to achieve a maximum reach or distance d of two feet between the sidewall and the joist 11 alternatively as seen in fig4 the truss members 25 and 26 may be pivoted upwardly about the bolt 29 to achieve a minimum reach or distance d of four inches between the sidewall and joist obviously the truss members may be pivoted to intermediate positions between these two extremes to accommodate variations in spacing between the joists and the sidewalls if the gap between the joist and sidewall should exceed two feet the adjustable sidewall connection and one half of the delta joist may be used.