• AS - distance from the line of foundation anchors to the outer edge of cladding
• AG - distance from the line of foundation anchors to the outer edge of cladding

• BG - distance from the web line to steel line [standard BG = 215 mm]
• FUG - distance from the line of foundation anchors to steel line
  [standard FUG = 315 mm]
• WA - width of cladding on gable wall
• AG - distance from the line of foundation bolts to the outer edge of cladding
• L.S. - steel line
• BS - distance from web line to steel line [standard BS = 215 mm]
• FUS - distance from the line of foundation anchors to steel line
  [standard FUS = 315 mm]
• WA - width of cladding on longitudinal wall
• AS - distance from the line of foundation bolts to the outer edge of cladding

System of axes - steel line

• L.S. - steel line [line marking overall dimensions of a hall without cladding]
• TH - steel line intersection ordinate
• WP - column web intersection ordinate
• WR - height of wall transom [standard WR = 200 mm]
• PH - height of purlin
• BS = WR + 15 mm [ standard BS = 215 mm]
• FUS - distance from the line of foundation anchors to steel line
• FUS = BS + 100 mm [standard FUS = 315 mm]
• A = PH + 15 mm
• X = TH + (BS x tan)
• C = A /cos
• WP = X - C