In random rubble masonry, stones are:
Choose the correct answer
Finely dressed to uniform dimensions and laid in regular courses
Uncoursed, laid without regular courses; stones are rough/irregular; gaps filled with smaller stones and mortar (most economical type of stone masonry)
Laid in uniform courses only
Always dry-laid without mortar
Correct Answer
B. Uncoursed, laid without regular courses; stones are rough/irregular; gaps filled with smaller stones and mortar (most economical type of stone masonry)
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Stone masonry types (IS 1597): Random rubble uncoursed (cheapest, irregular); Coursed rubble (rough stones in levelled courses); Ashlar rough tooled (regular dressed stones in regular courses); Ashlar fine tooled (smooth-dressed joints); Ashlar block-in-course. Random rubble used for compound walls, garden walls, retaining walls.
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