TW30
Tidewall TW box series. Extruded vinyl, Box profile.
| Property | Imperial | Metric |
|---|---|---|
| Width | 20 in | 508 mm |
| Height | 7 in | 178 mm |
| Thickness | 0.25 in | 6.35 mm |
| Weight of wall | 3.24 lb/ft² | 15.8 kg/m² |
| Moment of inertia | 41.4 in⁴ per ft of wall | 5,653 cm⁴ per m of wall |
| Elastic section modulus | 11.6 in³ per ft of wall | 623 cm³ per m of wall |
Allowable moment 3,141 ft-lb/ft; ultimate moment 6,283 ft-lb/ft; E = 380,000 psi; UV-stabilized exterior-grade rigid PVC. Wall weight is calculated from Tidewall's weight per foot and section width.
Source: Tidewall website, TW30 technical data (tidewall.com), Oct 2026. Confirm properties with the manufacturer before design.