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Post by lena01 on Aug 21, 2017 6:42:35 GMT -6
Bamboo is a group of woody plants in the true grass family Poaceae.
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Post by lena01 on Aug 21, 2017 6:38:44 GMT -6
Roof tiles are designed mainly to keep out rain, and are traditionally made from locally available materials such as terracotta or slate. Modern materials such as concrete and plastic are also used and some clay tiles have a waterproof glaze.
Roof tiles are 'hung' from the framework of a roof by fixing them with nails. The tiles are usually hung in parallel rows, with each row overlapping the row below it to exclude rainwater and to cover the nails that hold the row below. There are also roof tiles for special positions, particularly where the planes of the several pitches meet. They include ridge, hip and valley tiles. These can either be bedded and pointed in cement mortar or mechanically fixed.
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Post by lena01 on Aug 21, 2017 6:36:51 GMT -6
Wood is a heterogeneous, hygroscopic, cellular and anisotropic material. ... There are no vessels ("pores") in coniferous wood such as one sees so prominently in oak and ash, for example. The structure of hardwoods is more complex.
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