TW50
Tidewall TW box series. Extruded vinyl, Box profile.
| Property | Imperial | Metric |
|---|---|---|
| Width | 20 in | 508 mm |
| Height | 8 in | 203 mm |
| Thickness | 0.3 in | 7.62 mm |
| Weight of wall | 3.9 lb/ft² | 19 kg/m² |
| Moment of inertia | 70.7 in⁴ per ft of wall | 9,655 cm⁴ per m of wall |
| Elastic section modulus | 16.1 in³ per ft of wall | 866 cm³ per m of wall |
Allowable moment 4,360 ft-lb/ft; ultimate moment 8,720 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. Tidewall prints the weight as 6.5 lb/ft and 9.41 kg/m, which do not agree exactly; the lb/ft value is used.
Source: Tidewall website, TW50 technical data (tidewall.com), Oct 2026. Confirm properties with the manufacturer before design.