Explain with neat sketch patterns provided in the dressing of trap stone.

Explain with neat sketch patterns provided in the dressing of trap stone.
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1 Answer

Answer :

Following Patterns are provided in the dressing of stones

1. Hammer Dressing: In this case, stone blocks are roughly made rectangular by means of wallers hammer. The exposed face is roughly shaped by a mash hammer. 

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2. Pitched face dressing: In this case the edges of stone upto 25 mm on all side are dressed in level and superfluous stone on the face is remained as it is on the face

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3. Chisel drafting: In this type of dressing, drafts are made at all four edges with the help of chisel and any superfluous stone at all centre is removed by pitching tool or scrabbling hammer. This type of dressed stones is used in the masonry work as a quoin stones at corner. 

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4. Roughed tooled dressing: In this type of dressing work; first edges are made squared and then a series of continuous and parallel fine chisel lines are developed on the face with the help of batting or broad tool. This is common dressing for ashlar masonry work. 

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5. Punched dressing: In this case, a rough tooled surface is further dressed so as to form the series of parallel ridges with the help of punch. 

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6. Reticulated finish: In this type of dressing, polygonal or irregular shaped reticules are formed in the central portion of the stone.

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7. Vermiculated finish: In this finish, the sinking about 10 mm below surface is made more curved which resembles like worm eaten appearance.

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8. Picked finish: In this type of finish, the exposed face of the stone is dressed with the help of a tool called as point and thus it forms small pits on the exposed surface. In this finish, most of the projections are removed and it gives fine surface to the stone face. 

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