TIMBER:

1.    Timber used for construction should be well seasoned  it should not contain moisture more than 12%

2.   The seasoning should be done by either natural or artificial seasoning

3.    Timber should be from the heart of hard wood tree

4.    It should be free from knots, shakes, warp, white patches, crakes and holes

5.    It should not be affected by termites

6.    The cross section of the timber should show uniform colour and texture

7.    The grains of the timber should be seen when cut

                        8.   The timer should be hard and strong but should be easy to work with using                                      tools. The timber should not split or crack when making Tennon, Mortises                                      and   other  joints
                        9.   Different species of timber can be used in different purposes 
                               A. Central province teak (CP teak), Ghana teak, Burma Teak can be used for                                frames , wooden trusses and rafters, furniture etc
                               B. Species such as Sal, Silver etc. should be used for rough work, door                                                frames, concealed frame work for partition false ceiling etc
                               C. Burmah teak, High quality CP teak, sesam etc, can be used for decorative                                      work which is polished

BRICKS:

1.    Bricks should have uniform size and shape

2.    They shall be uniformly burnt

3.    They should have sharp edges. They should have a frog of 10 mm deep on one of the flat face

4.    They should not absorb water more than 20% of their weight  when measured in the dry and saturated state

5.    They should have uniform colour and texture

6.    They should not break when dropped on the ground from waist height on their flat face

7.    They should emit a ringing sound and not a dull sound when struck on each other

8.    They should have a minimum compressive strength of  15N/mm sq.

9.    They should be free from effloresance

10. The size of brick should be 230x110x65 to 70mm

SAND:

1.    Sand used for construction should be well graded

2.    It should be free from injurious amounts of silt (not exceeding 8%) If there is excessive silt the sand shall be washed before use

3.    It should be free from organic and chemical impurities and salt

4.    As far as possible river sand or pit sand shall be used

5.    Crushed sand may be used in combination with river sand if approved by the Structural designer

6.    Sea sand should not be used

7.    If the sand is moist it should be tested for bulking

If bulking is detected, additional sand shall be added to the mix to compensate for the increase in volume due to bulking. Also the water cement ratio for the mix should be adjusted for the moisture present in the sand.

8.    For plaster work the sand shall be sieved before use

REINFORCEMENT STEEL:

1.    Reinforcement bars shall be of the strength and make as specified by the Structural Designer

2.    Reinforcement bars shall have a tensile strength  of 415N/mm sq. For Fe 415 steel or 500N/mm sq. For Fe 500 steel

3.    The reinforcement bars shall be of TMT type (Thermo mechanically treated )

4.    The nominal diameter of the bars should be as specified in the structural drawings

5.    Re rolled steel shall not be used

6.    Steel used shall be of ‘Tata’/ ‘Mukund Iron’ / Jindal steel make.

7.    The steel shall be free from scales and rust

8.    A test certificate from the manufacturer should be obtained

9.    In addition if required sample pieces should be sent to the laboratory and got tested

10. In case of marine environment galvanized bars shall be used

GENERAL SPECIFICATIONS FOR STONE:

1. Stone used for construction should be obtained from approved quarry.

2. Stone should be free from cracks, flaws, veins  etc.

3. The stone should not absorb water more than 5% of its weight

4. The stones used should be of such size which can be easily handled and dressed by tbe workmen.

5. The stone should have a minimum compressive strength as specified by the structural designer

6. Typical stones used for construction include, Basalt, Granite, Deccan trap, Sand stone, Lime stone and Laterite

GENERAL SPECIFICATION FOR OIL PAINT

1.    The paint shall be of the specified make such as Asian, Nerolac, Berger etc.

2.    The paint shall be of the approved colour or the colour may be achieved by adding stainer  to white oil paint

3.    The primer used for oil paint shall be as follows

a.    For painting wood and plaster surfaces universal primer shall be used

b.    For painting steel surfaces red oxide or zinc chromate primer shall be used

4.    Painting of wood or plastered surfaces

a.    The surface shall be rubbed smooth witn the help of sand paper and cracks shall be filled with putty. Putty shall be made by mixing whiting powder and linseed oil

b.    Universal primer shall be applied in single coat with the help of a brush

c.    Oil paint of approved make and colour shall be applied with the help of a brush in two coats taking care not to leave any brush marks. The paint can be thinned down by adding thinner or turpentine

5.    Painting of steel surfaces

a.    The surface to be painted shall be rubbed with a emery paper and any scales, rust shall be removed.

b.    The surface shall be given a coat of primer either red oxide for general works and zinc chromate for more important works.

c.    Two coats of oil paint shall than be applied with the help of a brush or by spraying

UCR MASONRY IN PLINTH

A.   MATERIALS:

1.    STONE:

Stone used for the work shall be basalt obtained from approved quarry. The stone used shall be free from cracks, flaws, veins. The size of the stone should be such as can be handled by the workmen

2.    CEMENT MORTAR:

Cement mortar in the proportion of 1:6 shall be used. The cement used shall be ‘Ultra Tech’ 43 grade cement. The sand shall be well graded sand free from silt and other impurities

3.    CEMENT CONCRETE:

The cement concrete used for the base shall be of proportion 1:3:6

B: LAYING OF CONCRETE BASE:

The foundation strata shall be got checked and approved from the Structural Engineer. Concrete of proportion 1:3:6 shall be well mixed in a mechanical mixer and laid to a thickness of 150mm.  The width of the concrete base shall be as shown on the drawing or as instructed. The concrete shall be well compacted and cured for minimum 14 days

C: CONSTRUCTING THE UCR WALL:

 The centre line of the wall will be checked and marked with a string. The wall shall be constructed taking reference of the centre line, of the required width as shown in the drawings or as directed. The stones shall be lightly dressed and placed in a bed of cement mortar 1:6 in such a way as to break joints. The joint thickness should not exceed 25mm. Gaps between the stones should be filled with stone chips (spals). Through stones and bonders shall be placed at every 1m in the width and height of the wall. The line and level of the wall shall be constantly checked.

D: CURING:

The wall shall be kept wet for a period of minimum 14 days.

E: ITEM TO INCLUDE:

Apart  from the above the item shall include timbering and strutting if required, bailing out of subsoil water etc.

CERAMIC TILE FLOORING

A.   MATERIALS

1.    Cement : Cement used shall be 43 grade cement of ACC or Ultra Tech brand. The cement shall be fresh (not more than two months old from the date of manufacture)

2.    Sand: Sand used shall be river sand, well graded and free from excessive amounts of silt, organic and chemical impurities

3.    Ceramic tiles: Ceramic tiles shall be of ‘Kajaria’ make of nominal size 600x600  of thickness 8mm, of first quality as per approved shade and design.

4.    Plastic spacers: Plastic spacers as approved to be used  at the junction of tile joints

5.    Joint filler shall be of ‘Roff’ make of the specified colour

B.   TILE LAYOUT:

The tile layout shall be as per drawings and instructions. The starting point for tiling shall be as shown on the drawing. The cut tiles shall be adjusted as per the tiling layout.

C.   CLEANING OF THE CONCRETE SURFACE:

The concrete base shall be cleaned of all loose material and dust.

D.   CEMENT MORTAR BEDDING :

Cement mortar screed in the proportion 1:4 shall be laid on the concrete base as per the thickness required to achieve the level of the tiles. The level of the finished floor shall be marked on the adjoining walls and shall be used as a reference to determine the thickness of the mortar screed.

E.   WETTING OF THE TILES:

The tiles shall be kept immersed in water for at least 2 hours before tiling

F.    NEAT CEMENT FLOAT AND FIXING OF TILES:

Pure cement should be mixed in water to create a cement paste with the consistency of honey. This paste should be spread over the surface of the screed and the tiles should be fixed on the screed and gently tapped with the help of wooden mallet. The level of the tiles shall be checked from time to time with the help of a straight edge and string used for reference attached to a reference tile placed in the corner of the room. Plastic spacers shall be fixed at the corners of the tile and the adjoining tile shall be placed leaving a space equal to the spacer between the tiles.

G.   FILLING OF GROUT (JOINT FILLER)

After laying of the tiles the joints between the tiles shall be filled with joint filler of the required colour.

H.   CURING AND CLEANING:

The finished surface of the tiles shall be kept continuously wet for a period of minimum 7 days. After curing is complete the surface of the tiles shall be cleaned with a dilute acid wash and then washed with plain water.