TW55
Tidewall TW box series. Extruded vinyl, Box profile.
| Property | Imperial | Metric |
|---|---|---|
| Width | 24 in | 610 mm |
| Height | 8 in | 203 mm |
| Thickness | 0.29 in | 7.37 mm |
| Weight of wall | 3.33 lb/ft² | 16.3 kg/m² |
| Moment of inertia | 57.6 in⁴ per ft of wall | 7,862 cm⁴ per m of wall |
| Elastic section modulus | 14.3 in³ per ft of wall | 769 cm³ per m of wall |
Allowable moment 3,932 ft-lb/ft; ultimate moment 7,865 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. Printed metric section modulus (788.8 cm³/m) does not match the imperial value; the imperial value is shown and converted.
Source: Tidewall website, TW55 technical data (tidewall.com), Oct 2026. Confirm properties with the manufacturer before design.