supply of caution order boardcaution order board,caution order board retro-reflective engineering indicator boards, made of 2mm thick al uminum sheet or 3mm thick aluminum composite |sheet, face to be fully covered with high |intensity enca psulated type heat activated retro-reflective sheeting conforming to |type-iv of astm-d4956-01 in yellow & black or other colour combination including subject matter, message, symbols. borders etc. as approved by engineer incharge or as per irpwm guidelines, pasted on substrate by an adhesive backing which shall be activated by applying heat and pressure conforming to class-2 of astm-d-4956-01 and fixing |the same wit h suitable sized aluminum alloy rivets @ 20 cm c/c to back-support |frame of m.s. angle iron of size 25mm x25mm x 3mmprovided all along the edges of board with theft resistant measures back side of board shall be with non-peelable weatherproof paint, consisting of one coat of zinc chromate |primer and two coats of epoxy paint. [ warranty period: 30 months after the date of delivery ] ]