Important Points To Remember For Civil Site Engineer

 Important points to remember for civil site Engineer 

Important Points to Remember for Civil Site Engineer

https://youtu.be/8kC9KPEq9Wk

Every engineer must know to avoid error on-site while working as Explained below
1. Clear Cover to the main reinforcement

            Footing : 50 mm

            Raft Foundation Top : 50 mm, Bottom/Sides: 75 mm

            Beam : 25 mm

            Slab : 20 mm

            Column : 40 mm

            Staircase:15 mm

2. The standard weight of 1m steel bars
Formula: the weight of bar per meter length = d²/162 kg/m , d-diameter of bar in mm

      8 mm 0.39 kg/m

      10mm - 0.62 Kg/m

      12mm - 0.88 Kg/m

      16mm- 1.58 Kg/m

      20mm - 2.47 Kg/m

      25mm - 3.85 kg/m

      32mm - 6.32Kg/m

      3. One-Way Slab

      The ratio of longer span (l) to shorter span (b) is equal or greater than 2

      The main reinforcement is provided in shorter span & distri. Reinf. in the longer span.

4. Two Way Slab

Ratio of longer span (l) to shorter span (b) is less than 2

load will be carried in both directions. So, the main reinforcement is provided in both direction for two-way slabs.

5. Main bars in reinforcement

Main bars in the slabs shall not be less than 8 mm (HYSD) or 10 mm (Plain bars)

6. Distribution bars

      Distribution bars are not less than 8 mm and not more than 1/8 of the slab thickness.
7. Minimum thickness of slab is 125 mm

8    8. Compressive strength of Bricks is 3.5 N / mm2 and

                Water absorption should not be more than 15 %

9. The freefall of concrete is allowed a maximum to 1.50m.

10.  Excavation work for basement above 3m should be stepped form

11.  Electrical conducting shall not run through the column

12.  Dimension tolerance for cubes + or – 2 mm

13.  The pH value of the water should not be less than 6.

14.  In soil filling as per IS code for every 100 sqm, 3 samples for core cutting tests should be taken.

15.   Lapping is not allowed for the bars having diameters more than 36 mm.

16.  Longitudinal reinforcement not less than 0.8% and more than 6% of gross c/s.

17.  Minimum bars for the square column is 4 no’s and 6 no’s for the circular column.

18.  Samples from fresh concrete shall be taken and at least a set of 6 cubes of 150mm shall be prepared and cured. 3 Cubes each at 7 days and 28 days shall be tested for compressive strength. The test results should be submitted to the engineer for approval. If results are unsatisfactory necessary action/rectification/remedial measures have to be exercised.

19.  Slum of concrete as per IS code

Lightly reinforce structure is 25mm-75mm

Heavily reinforce structure is 75mm-100mm

20.  Curing time of RCC Members for different types of cement

Super Sulphate cement                      :  7 days

Ordinary Portland cement OPC         : 10 days

Minerals & Admixture added cement: 14 days

Watch full video on this link https://www.youtube.com/watch?v=8kC9KPEq9Wk

 DND Construction