{
 "designation": "400x300x12.5RHS",
 "type": "Rectangular Hollow Section",
 "standard": "AS/NZS 1163",
 "mass_kg_m": 128.0,
 "dimensions_mm": {
  "d": 400.0,
  "b": 300.0,
  "t": 12.5,
  "ro": 31.25
 },
 "properties": {
  "A": 16338.2854,
  "Ix": 370380121.3479,
  "Iy": 238284708.2833,
  "Zx": 1851900.6067,
  "Zy": 1588564.7219,
  "Sx": 2225505.0146,
  "Sy": 1830465.7467,
  "J": 471063341.3252,
  "C": 2586200.0469,
  "Iw": 0.0,
  "rx": 150.5638,
  "ry": 120.766,
  "mass_calc": 128.2555,
  "surface": 1.3463,
  "surface_t": 10.5183
 },
 "design_AS4100": {
  "grade": "C450L0",
  "fy": 450,
  "fu": 500,
  "kf": 0.9964469898478097,
  "phiVv": 2278125.0,
  "phiNs": 6593495.282536105,
  "phiNt": 6249394.149921587,
  "phiMsx": 901329530.9242067,
  "phiMsy": 639384966.8641065,
  "ab": -0.5
 },
 "units": "mm, N, N.mm (capacities); see /notation/",
 "source": "https://steelinfo.au/rectangular-hollow-sections/400x300x12-5rhs/"
}