| 摘要 |
A stackable section (1) which, may be stacked with other sections (1) to form a liner (200) for a manhole chamber. The stackable section (1) has an inner (11) and outer (13) skin and at least a part of the stackable section (1) has two webs (21, 23) extending in a direction generally perpendicular to the stacking direction At least one web (21, 23) may extend between the inner (11) and outer (13) skins. The stackable section (1) may define a perimeter having two ends and at least one web or a combination of webs (21, 23) may extend over a majority of the distance between the two ends. The stackable section may comprise four straight pieces (3) and four curved pieces (9) arranged to form a substantially rectangular perimeter. At least one piece (3) may be made by pultrusion. |
