| 摘要 |
A structure, for example the hold of a ship, having a base surface lined with plastic sheeting having a greater coefficient of expansion than that of the base surface material held to the base surface by a fastening arrangement in which the sheeting is provided with spaced-apart engagable marginal areas bordering aperture means extending from surface to surface of the sheeting. Fastening means includes a metal pin rigidly connected to the base surface and has a shank extending through the sheeting and head means on the pin bearing on the engagable marginal areas. The marginal areas are separated from the shank by an expansion gap to allow movement of the sheeting parallel to the base surface. The shank has a rugose surface, provided with lateral projections intervened by recesses, and the head means is a cap member having a body of resilient material of mushroom-like cross-section provided with a central opening by which it is forcibly impaled on the pin and having a planar base slidably engaging the marginal areas. The aperture means may be openings provided within the peripheral margins of the sheet or the marginal areas of a pair of adjoining sheets making up the sheeting where the aperture means is a gap between the peripheral margins of respective sheets or both. In a preferred structure, the rugose part is made up of a series of frusto conical rings having undersurfaces perpendicular to the axis of the pin providing annular acute cornered ribs and intervening grooves.
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