"MOUNTING FRAME ASSEMBLY FOR MG-30AND MG-40 STRUCTURES ONLY. USED FOR LOW-IMPACT RESISTANCE STRUCTURES FOR LIGHTING SUPPORTS FOR AIRPORT APPROACHLIGHTING SYSTEMS,MODELS ALSF-2 AND MALSR. TEE SHAPED FRAME. OVER-ALL DIM.8 FT 0-1/4 INCH LONG BY 5 FT 5 IN WIDEBY 1 FT 2-1/4 INCH APPROX HIGH. THE LONG DIM. FORMS THE TOP OF THE TEE. CHANNELL 6 INCH BY 15.3 LB. VERT.PART OF TEE RECT. TUBE 6 BY 3 BY 3/16 INCH MAST TUBE BONDED TO STAND PLATE MOUNT ING TUBE WHICH IS 6.35 INCH ID BY 4 INHIGH. FRAME PIVOTS AT ENDS OF THE 8 FT0-1/4 IN. LONG DIM. TO LOWER THE STRUCTURE. MATERIAL OVER-ALL,STEEL. PER FAA SPEC. FAA-E-2702;ITEM 16, DRWG D-6155-1, ALSF-2 AND MALSR LIR STRUCTURES, STRUCTURAL CONFIGURATIONS"