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Showing posts with label Video Tutorial. Show all posts
Showing posts with label Video Tutorial. Show all posts

Tuesday, April 30, 2019

Layout of plot at construction site

From this civil engineering video tutorial, we will get some useful guidelines about how to create layout for any type of plot at construction site as well as details about grid layout drawing.

Gridlines belong to the labeling marks of a floor plan. For drafting the plan of a large area, these labeling marks will allow the plans to be placed in separate sheets and the grid lines will demonstrate the connection of the two framing plans. With grid lines, it becomes easier to recognize specific locations on the floor plan for any structural member in the floor plan.

As for instance, for a Column at grid A, this should be the first column location at Grid line A and Grid line B.

These generally stands for the letters from A to Z, etc, around the vertical direction; and letters 1 to 2, etc around the horizontal direction; that species the identity of one certain position of a structural member on the floor plan.

Grid lines are mostly provided in construction drawings alias working drawings. They play an important role throughout the setting out process on site. Each grid line gets across a wall or a column for that matter.

Spacing among one grid line to the other. points out the distance to exclude while arranging the walls and columns on site.

Each grid contains a marking. It is generally recommended to mark them both numerically and alphabetically omitting the number '0' and alphabets 'O and I' as these may become problematic for the reader to distinguish sometimes. When the contractor requires any modification on some column on site in case the engineer is not present, the contractor can give a call and easily identify the disputable column.

The use of grid lines is standard on any construction drawings.

For online demonstration, go through the following video tutorial.

Layout of plot at construction site

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Published By
Rajib Dey
www.constructioncost.co
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Saturday, April 27, 2019

How to measure the volume of silt content in sand

In this civil engineering video tutorial, you will learn some vital tips to work out silt percentage in sand or course sand to ensure that whether the sand is eligible to be used in concrete or not. It is recommended that the percentage of silt content of sand in concrete should be over 6%.

The silt stands for a very fine particle and the size of it is under 150 Microns. Silt content can be shrinked and inflated because of the weather condition. Therefore, it can impact the strength of the structure.

Impacts of Silt:

1. Crack will be created on concrete. (some cracks are found in the wall)
2. Silt content includes evaporated matters and salts. (mortar will be exposed at the time of plastering)
3. It engrosses more water. (broadened & shrink owing to the weather condition.


To determine the percentage of silt conent, the following items will be required :-

a. 250 ml, measuring cylinder
b. Course or fine sand
c. Water
d. Sand


The calculation is done as follow - Initially, it is required to area of cylinder as the cross sectional area from top to bottom will be same for the cylinder.

Area of cylinder = πr2 x Height

Suppose, the cylinder is filled with sand up to 100 ml, then water is added up to 50 ml. So, total volume will be 150 ml. Then, shake the bottle and wait for 2 hours. Now, it is found that the percentage of silt content in the sand is 5 ml. You can check the percentage of silt content in the following way :-

= Volume of silt (taken as V2) / Volume of sample (sand or course sand; taken as V1) x 100
= 5 / 100 x 100 = 5%


To get more information, watch the following video tutorial.

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Published By
Rajib Dey
www.constructioncost.co
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Wednesday, April 25, 2018

Steps to work out road filling in hilly area

S.L. Khan, the eminent civil engineer, presents another informative construction video tutorial where he briefly explains the process for working out the road filling in hilly area.

In this video, solution is given to the following examples :-


Examaple 1


With specified cross section of road in hill area, work out the quantity of earth work in banking toward the length of 100 ft.


Suppose the permission rate of the road is taken as breadth of the road and it is 32 feet. The half of it is 16 feet. The mean depth of the filling is taken as 1.85 feet. The side slope is taken as 2:1. The cross slope is taken as 10:1.


Based on the above data, the quantity of earth work in banking will be determined.


To obtain the total filling of this section, apply the following formula :-


Filling = Cross Section Area x Length


To learn rest calculation process, go through the following video tutorial.




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Published By
Rajib Dey
www.constructioncost.co
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