Building Materials
If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called

Bessemer pig
White or forge pig
Mottled pig
Grey or foundry pig

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Building Materials
Sapwood consists of

Thin fibre which extends from the pith outwards and holds the annular rings together
Thin layers below the bark
Innermost annular rings around the pith
Portion of timber between heartwood and cambium layer

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Building Materials
The plywood

Can be spilt in the plane of the panel
Has good strength along the panel only
Has greater impact resistance to blows than ordinary wood
Cannot be bent more easily than ordinary wood of same thickness

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Building Materials
The thermosetting plastic

All listed here
Chars at 343°C
At 127°C to 177°C permanently set and further application of heat does not soften it
Becomes rigid when moulded at suitable pressure and temperature

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