t bar ceiling joint 62 connector includes ring attachment 90 with bolt locations 39 for angled couplers or struts coupler is used at junction 62 to attach ceiling t bars 61 bolt 33 is shown if fig1 with detail to connect to upper union 100 in fig1 fig1 shows bottom piece at junction 62 with alternate method for connecting diagonal members to bottom carriage t bar members 61 rest on thru bolt 92 and top piece 35 is then installed to lock assembly adjustable hinges 32 and bolt assembly 31 give versatility in design and construction method by allowing multiple angles in roof truss frame and easy assembly with hinge pin 31 fig1 shows perspective top view of fig1 ready for the installation process that follows in fig1 fig1 shows upward assembly as in fig1 with installation of fixed coupler 11 and connection to upper strut 34 the strut is important in that it attaches to coupler above 100 and strengthens the roof truss assembly for larger spans reducing the size and weight of tube pipe it is important to mention that tube pipe members as in 81 and 82 could be made from a variety of materials with couplers location and vertical member assembly fig1 shows tube pipe connection members 10 is a 2 piece straight member with a hole for bolt 33 as mentioned tube pipe 10 as shown has 2 ends.