{
 "designation": "75x50x4.0RHS",
 "type": "Rectangular Hollow Section",
 "standard": "AS/NZS 1163",
 "mass_kg_m": 6.92,
 "dimensions_mm": {
  "d": 75.0,
  "b": 50.0,
  "t": 4.0,
  "ro": 10.0
 },
 "properties": {
  "A": 881.0404,
  "Ix": 630052.2358,
  "Iy": 334770.3723,
  "Zx": 16801.393,
  "Zy": 13390.8149,
  "Sx": 21143.7772,
  "Sy": 15980.7719,
  "J": 753680.1702,
  "C": 22731.1383,
  "Iw": 0.0,
  "rx": 26.7418,
  "ry": 19.4929,
  "mass_calc": 6.9162,
  "surface": 0.2328,
  "surface_t": 33.646
 },
 "design_AS4100": {
  "grade": "C450L0",
  "fy": 450,
  "fu": 500,
  "kf": 1.0,
  "phiVv": 130248.0,
  "phiNs": 356821.3704197311,
  "phiNt": 336997.96095196827,
  "phiMsx": 8563229.753201349,
  "phiMsy": 6472212.622954739,
  "ab": -0.5
 },
 "units": "mm, N, N.mm (capacities); see /notation/",
 "source": "https://steelinfo.au/rectangular-hollow-sections/75x50x4-0rhs/"
}