12 ft x 15/16 in Armstrong Prelude XL Exposed Tee ID Main Beam - 7300
12 ft x 9/16 in Armstrong Suprafine XL Exposed Tee ID Main Beam - 7500
12 ft x 1 1/2 in Armstrong Drywall Grid System HD Main Beam - HD8906
12 ft x 15/16 in Armstrong Co-Extruded Clean Room HD Main Beam - ES7901
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee ID Main Beam - 7300BL
12 ft x 9/16 in Armstrong Silhouette XL w/ 1/8 in Reveal ID Main Beam - 76008
12 ft x 9/16 in Armstrong Interlude XL HRC ID Main Beam - 6100HRC
12 ft x 9/16 in Armstrong Silhouette XL w/ 1/4 in Reveal ID Main Beam - 7600
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee HD Main Beam - 7301
1 3/4 in x 2 3/4 in x 12 ft Armstrong MetalWorks Linear Main Beam Carrier Assembly - 7177
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee HD Main Beam - 7301WA
12 ft x 1 1/2 in Armstrong Co-Extruded Clean Room HD Main Beam - EA7903
12 ft x 15/16 in Armstrong Prelude XL Fire Guard Exposed Tee ID Main Beam - 8300
12 ft x 15/16 in Armstrong Co-Extruded Clean Room ID Main Beam - EA7900
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee HD Slotted Main Beam - 7301TS
12 ft x 15/16 in Armstrong Environmental Prelude Plus XL Exposed Tee Main Beam - AL7200WA
12 ft x 9/16 in Armstrong Suprafine XL Exposed Tee HD Main Beam - 7501BL
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee HD Main Beam - 7301BL
