{
 "designation": "400x300x16.0RHS",
 "type": "Rectangular Hollow Section",
 "standard": "AS/NZS 1163",
 "mass_kg_m": 161.0,
 "dimensions_mm": {
  "d": 400.0,
  "b": 300.0,
  "t": 16.0,
  "ro": 40.0
 },
 "properties": {
  "A": 20496.6467,
  "Ix": 452554896.4074,
  "Iy": 290479505.6981,
  "Zx": 2262774.482,
  "Zy": 1936530.038,
  "Sx": 2752434.0754,
  "Sy": 2262001.7388,
  "J": 586377117.7896,
  "C": 3171552.9549,
  "Iw": 0.0,
  "rx": 148.5916,
  "ry": 119.0464,
  "mass_calc": 160.8987,
  "surface": 1.3313,
  "surface_t": 8.2691
 },
 "design_AS4100": {
  "grade": "C450L0",
  "fy": 450,
  "fu": 500,
  "kf": 1.0,
  "phiVv": 2861568.0,
  "phiNs": 8301141.926715735,
  "phiNt": 7839967.375231528,
  "phiMsx": 1114735800.5406716,
  "phiMsy": 904804340.4746222,
  "ab": -0.5
 },
 "units": "mm, N, N.mm (capacities); see /notation/",
 "source": "https://steelinfo.au/rectangular-hollow-sections/400x300x16-0rhs/"
}