Thursday, May 20, 2010

Plastering Deductions as per IS Code 1200

For small opening up to 0.5 m2 area, no deduction in plastering is made

For opening of size 0.5m2 to 3m2 area, deduction is made on one face of the wall.

For openings of size above 3m2, deduction is made on both faces of the wall,
but the area of sill, jamb and soffits of the opening is added.

There are many other clauses in IS Code such as:
1. If both sides of wall are plastered with a different mix
2. If only one side of the wall is plastered and other side is not

For such cases, its best to follow actuals then following IS code while preparing R.A bills.

Ceramic and Vitrified Tiles

Tile can be classified as Ceramic and Vitrified.

Vitrified tiles are of much better quality then Ceramic Tiles.

Ceramic tiles are glazed only on top and if top is destroyed, then the tile would lose its color.

Vitrified tiles are uniform throughout and much more durable, less porous and scratch-proof.

Generally for the wall, ceramic tiles maybe used, but for floors vitrified tiles are prefferable.

Ceramic tiles can be manufactured locally, however vitrified tiles require high budget industrial equipment

Steel Bars in India

2 comon types of steel bars used are
  • Mild steel bars conforming to IS: 432
  • Cold-worked steel high strength deformed bars conforming to IS: 1786 (grade Fe 415 and grade Fe 500)
The numbers 415 and 500 indicate yield stresses 415 N/mm2 and 500 N/mm2 respectively

Grade Fe 415 and Fe 500 is being used most commonly nowadays because of higher yield stress and bond strength resulting in saving of steel quantity.This has limited the use of mild steel bars

Some companies have produced the thermo mechanically treated (TMT) and corrosion resistant steel (CRS) bars with added features.