Building Maintenance

By removing the loose concrete, the repair and rehabilitation of damaged or spalled concrete is done. Temporary support is provided to the girder to relieve dead load stresses and the case of pretressed concrete bridge decks, special stress check up is essential before starting the repair works.

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

Burnt Sienna imparts brown colour to paint. Raw sienna, soot and ultramarine imparts yellow, black and blue colour respectively to paint.

The structural concrete slab panels can be repaired by external bonding of steel plates to the soffit by using epoxy adhesives and hollows.

The weight of a person is taken as 68kg while calculating the handling capacity of the lift.

If a paint is applied excessively thick then wrinkling occurs. Grinning occurs when under coat and final coat are of different colours. Running occurs if the surface is too smooth; paint run off from such parts. Flaking occurs due to poor adhesion, leading to peeling off of paint.

Barins snooper vehicle is used to inspect in case of bridge greater than 10.7m in height and which cannot be inspected from beneath due to watery situation. The snooper is mounted on a heavy duty truck with a swiveling platform and the underside of the bridge deck can be inspected by using the hydraulically operated platform.

IS 6313 part I and II gives detail about termite treatment. Wood, plastic, leather and rubber can be attacked by termite. Anti termite protection is therefore used.

DPC materials can be classified into 3 categories. The categories are flexible materials, semi rigid materials and rigid materials.

Pre-Stressed Concrete is a block of concrete which has been subjected to compression prior to supporting any loads.