eps = 0.01;
inches = 25.4;

tst = 0.26 * inches;	
pw = 6.5 * inches;		
tw = pw + tst;			
pt = 7;					
th = 2;					
vsw = 5 * tst;			
vsdp = 2 * tst + th;	
vsdf = vsdp + th + pt;	
st = 0.5;				

module TopStrutConnector()
	translate([0, 0, -10])
		difference() {
			cube([tw, vsdf + pt, pt]);
			translate([2.1 * inches, -eps, -eps])
				cube([2.4 * inches, vsdf, pt + 2*eps]);
			}

module S2()
	difference() {
		projection(cut = true)
			translate([0, 0, 10-1])
				TopStrutConnector();
		translate([-5, -100 + tst + tst + th])
			square(100);
		};
	
module ConnSup()			
//#	linear_extrude(vshb + vsht)
		difference() {
			S2();
			offset(-st)
				S2();
			}

TopStrutConnector();
ConnSup();