Stone masonry
Stone masonry

Principle for Supervision of Stone Masonry

The following principles should be followed during construction of stone masonry:

  1. The stone used in masonry should be durable and strong.
  2. All stones should be well watered before laying to avoid absorption of moisture from mortar.
  3. All stones should be properly dressed.
  4. The stones should be laid on their natural bed so that pressure acts normal to their bed.
  5. The different sized stones should be placed so that continuity of vertical joints is broken in the structure.
  6. The stones from opposite faces should make proper bond with each other.
  7. The height of stone should never be greater than their minimum horizontal dimension.
  8. Small stone chips should never be used in bed joints.
  9. Quoins should be laid as stretcher and header in alternate courses.
  10. Large flat stones used as bed plates should be provided under the ends of beams, girders etc.
  11. The hearting of the masonry should be properly packed with stone chips to avoid hollows.
  12. The upper surface of old structure must be cleaned before placing fresh mortar.
  13. The joints on the surface should be raked at least 2.5 cm deep and pointed with rich cement mortar.
  14. Double scaffolding should be used.
  15. After masonry is laid, it should be cured for a period of 2 to 3 weeks.
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