"T-M TEE BAR ASSEMBLY USED ON LOW-IMPACT RESISTANCE STRUCTURES FOR LIGHTING SUPPORTS FOR AIRPORT APPROACHLIGHTING SYSTEMS,MODELS ALSF-2 AND MALSR. PULTRUDED TUBE 1-3/4 INCH SQ BY10 FT 5 IN LONG. PER FAA SPEC. FAA-E- 2702;ITEM 4, DRWG D-6155-1, ALSF-2 AND MALSR LIR STRUCTURES, STRUCTURAL CONFIGURATIONS"