Federal supply schedule FSC group. 56. Construction and building materials, pt. 1 (formerly class 59), FSC class 5610, Mineral construction materials, bulk, FSC class 5620, Building glass, tile, brick and block, FSC class 5640, Wallboard, building paper and thermal insulation materials, FSC elass 5650, Roofing and siding materials, GSA region 3, District of Columbia, Maryland, Virginia, and West Virginia. Feb. 15-Aug. 14, 1959; prepared by GSA region 3.

Tools