81. The size of a floor tile commonly used, is
82. The art of bringing the floor to a true level surface by means of screeds, is called
83. A roof which slopes in four directions, is called
84. In any good staircase, the maximum and minimum pitch respectively should be
85. The concrete slump recommended for columns, is
86. The vertical members fixed between steps and hand rail, are known
87. Dampness causes
88. While investigating the site, a thick layer of fairly firm clay over a deep layer of soft clay is encountered. In such a situation, the following type of foundation is useful:
89. A temporary rigid structure having platforms to enable masons to work at different stages of a building, is known as
90. The lower edge of the pitched roof, from where the rain water of the roof surface drops down, is known as
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