652— Multiple Panel Signs

652.1 Description

1 Furnish, fabricate, and install multiple panel signs.

652.2 Materials

652.2.1 Sign Panels

1 Provide signs made from extruded aluminum panels or flat sheet aluminum panels with attached aluminum extrusions. Use aluminum alloy that complies with ASTM B221, 6063- T6. Configure the signs as shown on the Plans and Standard Drawings . 2 When extruded panels receive a non- micro -prismatic reflective sheeting background, fabricate the panels with rounded corners at a radius of 0.031 in., and chamfer on the edge to facilitate wrapping the reflective sheeting around the edge and fitting the panels together. 3 When extruded panels receive a micro- prismatic reflective sheeting background, fabricate the extruded panel corners according to the sheeting manufacturer’s recommendations . Also, a pply the reflective sheeting to the face according to the sheeting manufacturer’s recommendations . 4 Furnish extruded panels in widths of 6 in. and 12 in. Use panels that are flat and straight within commercial tolerances set by the aluminum industry. 5 Provide flat sheet multiple panel signs consisting of 0.125- in. thick flat sheet aluminum that complies with ASTM B209, Alloys 6061- T6, 5052 -H38 or 5154- H38 with attached aluminum extruded stiffeners and splicers such as SIGNFix® extrusions or equal. Attach the extruded shapes to the flat sheet panels with Very High Bond (VHB) foam tape and/or rivets. Ensure that the sign fabricator install s the extrusions before delivery. If flat sheet multiple panel signs are mounted overhead, use a riveted connection at the end of each extruded shape to attach the extrusion to the flat sheet panel. Use a horizontal splice if the signs are constructed from more than one flat sheet panel. Do not use vertical splices. 6 Obtain approval for the number, length, and placement of the extruded shapes from the Director of Traffic Engineering before fabrication.

652.2.2 Mounting Hardware

1 Use post clips to fasten extruded multiple panels to supports. Use stainless steel or cast aluminum post clips conforming to ASTM B26, Alloy SG70A -76 or ASTM B108, Alloy 356- T6. Install post clips as indicated on the Plans and Standard Drawings . Use aluminum or stainless steel mounting bolts, nuts, and washers as indicated.