{
 "designation": "273.1x4.8CHS",
 "type": "Circular Hollow Section",
 "standard": "AS/NZS 1163",
 "mass_kg_m": 31.8,
 "dimensions_mm": {
  "do": 273.1,
  "t": 4.8
 },
 "properties": {
  "A": 4045.8687,
  "Ix": 36416828.6143,
  "Iy": 36416828.6143,
  "Zx": 266692.2637,
  "Zy": 266692.2637,
  "Sx": 345564.336,
  "Sy": 345564.336,
  "J": 72833657.2286,
  "C": 533384.5275,
  "rx": 94.8736,
  "ry": 94.8736,
  "mass_calc": 31.7601,
  "surface": 0.858,
  "surface_t": 26.9802
 },
 "design_AS4100": {
  "grade": "C350L0",
  "fy": 350,
  "fu": 430,
  "kf": 1.0,
  "phiVv": 458801.50865209696,
  "phiNs": 1274448.6351447138,
  "phiNt": 1274448.6351447138,
  "phiMsx": 98327780.74796738,
  "phiMsy": 98327780.74796738,
  "ab": -0.5
 },
 "units": "mm, N, N.mm (capacities); see /notation/",
 "source": "https://steelinfo.au/circular-hollow-sections/273-1x4-8chs/"
}