Tip of the Day



General Observations and Suggestions

     Following are the general observation & corresponding suggestions for  

     various school buildings:

 
 

S. No.

Observations

Suggestions

1

Proper cover to the reinforcement of columns/ beams/ lintel/ slab is not provided.

Proper cover as per code to the reinforcement of columns/ beams/ lintel/ slab should be provided.

2

Proper compaction of concrete using vibrators/temping rods is not done at most of the sites. Honeycombing is seen at few places in the RCC members.

Proper compaction of concrete using vibrators/ temping rods should be done to avoid the honey combing.

3

Lintel band at door level provided over a course of brick.

Course of bricks should not be placed between the lintel band and door frame/opening.

4

The shear hooks are not bent at 135o.

Stirrups/ shear hooks should be bent at 135o inside. It is essential provision for safety against earthquakes.

5

Storage of cement is not proper.

Cement should be stored in proper way on aerated, dry and raised wooden platform.

6

Corner reinforcement is not tied properly to the foundation and the same is not anchored in the slab.

Corner reinforcement should be tied properly to the foundation and the same should be anchored in the slab properly.

7

mproper shuttering is used and insufficient supports have been provided.

For the casting of RCC members, good quality of shuttering should be used and sufficient vertical supports should be placed.

8

Good quality water is not being used at a few sites for construction work.

Good quality water, suitable for drinking purpose, should be used for construction work, which is required for the durability of concrete.

9

Curing of concrete/masonry work is not being done as per schedule.

Curing of concrete/masonry work should be done as per schedule as it is required for proper strength gain and to avoid cracking.

10

Finishing of roof not completed with proper slope, khurras and gola.

Proper slope should be given at the time of finishing of roof with proper drainage system.

11

At a few places the quality of bricks is inferior or blocks are with honeycombing.

First class bricks having class designation 75 are to be used in all masonry work and concrete blocks casted on finished surface with proper compaction should be used.

12

The thickness of joint mortar is too much and is not uniform at a few places.

The thickness of joint mortar should be 10 mm maximum for attaining higher strength in masonry.

13

The back-filling of foundation and laying of floors is not as per specifications.

Back filling of foundation should be well compacted in layers to give desired strength to foundation. Proper compaction of floor base ensures no settlement afterwards.

14

Finishing of floor is not done properly. Skirting as well as glass strips are not provided in floor.

The floors should be laid properly with skirting & glass strips also to be used as per specifications.

15

 Priming work is not done on the door/ window frames before fixing.

Primer should be done before fixing of door/window frames. This will enhance the service life of the components.

16

 Door frame is not of good quality wood.

Defect free wood of proper size and thickness should be used in the door/ window frames.

17

Plinth protection (apron) not provided in the building.

Plinth protection (apron) should be provided all-around the building as per specifications. The apron saves the building foundation soil from erosion and helps in providing proper drainage of water.

18

 Horizontal cracks are visible in masonry between lintel and roof level.

A slip joint between the roof slab and masonry wall using mastic compound should be provided and a 10 mm groove in the wall plaster below the roof slab should also be provided.

19

 Hair cracks are visible in RC beams/columns.

The structural cracks in RC beams/columns should be properly filled using structural epoxies. However, hair-line non-structural cracks may be repaired using rich cement-sand mortar.

20

 Exposed extra reinforcement of RC columns at roof level was seen.

Exposed extra reinforcement of RC columns at roof level should at least be cut and be covered with rich cement sand mortar.

21

 Drip/string-course is missing at projections.

Drip/String-course should also be provided for all the projections. This reduces the entry of rain water on the walls and in to the building.

22

 Damp patches have been observed at a few places on ceiling and on the walls.

Causes of the dampness/leakage should be identified. Proper treatment of roof/walls should be done after removing the cause.

23

 Columns are casted with improper alignment.

Column should be cast with proper alignment as load carrying capacity of column reduces significantly due to eccentricity.

24

Vertical/inclined hair cracks are present in masonry walls.

Vertical/inclined hair cracks of walls should be treated by using chicken wire mesh nailed in the wall and finished with rich cement sand mortar properly.

 
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