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Thursday, June 4, 2020

Electric Arc Welding

The electric arc welding process utilizes an electric arc to produce warmth to dissolve the parent material and the filler material (cathode) to frame a liquid weld pool in the joint. The electric arc welding strategy is favored over different techniques because of its reasonableness.

The most normally utilized affixing techniques for joining steel members of a steel structure are welding, riveting, and catapulting. While riveting and shooting use bolts and rushes to join the workpieces, welding depends on liquefying the workpieces to meld it.

In this article, we talk about the technique of laying, creating, welding, amassing, and erection of steel structure by electric arc welding strategy.

1. Spreading Out Steel Members: A figure of the steel structure to be created will be drawn on a level stage to full scale. This might be done in full or in parts, as appeared in drawings or per the site condition. Steel tape will be utilized for estimations of the steel members.

2. Creation of Steel Members: In all steelworks, shop drawings will give total subtleties for the creation of the steel part, including the area, type, length, size, and subtleties of welds. Additionally, the part will be set up preceding the genuine manufacture.

The steel members will be stamped or painted with the distinguishing proof checks as given in the shop drawings. Crafted by creation will be completed with extraordinary exactness so that these can be gathered without being unduly pressed, constrained into position, or stressed.

At the point when developed, the members will be valid and liberated from wind, crimps, clasps, or open joints. The layouts will at that point be set apart on the steel members, and spots of welding will be shown on them.

Electric Arc Welding
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Published By
Rajib Dey
www.constructioncost.co
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Wednesday, June 3, 2020

How to Create Templates in AutoCAD

Arguably the most famous and the most commonly used 3D modeling software ever, we all know about AutoCAD. It is a computer aided design and drafting solution brought to you by Autodesk. Today, we will learn how to create templates in AutoCAD.

As a design engineer, you often need to do the same type of design over and over again, don’t you? Every time you start one of these projects, you have to build the same things up from scratch. This can get frustrating. So, what do you do? Do you just copy-paste your previous design and make changes in that?

That’s a bad idea. It's prone to errors and you might end up doing more work than before.

What would be better is to keep a handy “basic” drawing available that is common to all of these drafts you have to make. Then keep using this “format” every time you start a new drawing of that kind. 

What would be better is to keep a handy “basic” drawing available that is common to all of these drafts you have to make. Then keep using this “format” every time you start a new drawing of that kind. 

This is, basically, what templates are all about. Templates are “basic format” drawings which are saved in separate locations and are used as the starting skeleton for particular kinds of drawing. 
Templates in AutoCAD are one of such features which help us to reduce our work and to save time. Before starting a new design project we have to change many settings in the drawing page like units, sizes, dimension styles, layers, etc. It is not easy and practical to do the settings every time you start a new drawing.

There are many online construction templates available. But also, you can create a custom template in AutoCAD. You can define your own parameters in this template. They are saved with DWT file extension. When you use it to start a drafting project, then you can save it in standard AutoCAD DWG format.
Let us see how we can create templates in AutoCAD in eight simple steps. 

How to Create Templates in AutoCAD

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Published By
Rajib Dey
www.constructioncost.co
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Tuesday, June 2, 2020

Anti-Seismic Construction

"Earthquakes are possibly the worst nightmare of a civil engineer. In a deadly minute, lives and decades of work can get wiped out. But there are some buildings that can withstand earthquakes. In this issue, we will focus on what earthquakes do to a building, how to make it resistant to seismic waves, and how engineers around the world have erected some of the best quake-resistant structures."

Understanding Earthquakes in Construction Industry
Understanding Earthquakes in Construction Industry Knowing why seismic activities occur and how can they hurt a building is integral..


Tuned Mass Damper

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Published By
Rajib Dey
www.constructioncost.co
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MMRC and Chennai Metro Rail Projects in India Restart After Partial Lifting of Lockdown

After the partial lifting of restrictions on important construction work, construction work has resumed in two major metro rail projects in India. One of them is in Pune, developed by the MMRC (Maharashtra Metro Rail Corporation). The other is in Chennai, by CMRL (Chennai Metro Rail Limited).

The MMRC project in Pune has been stalled for over a month, and they missed the target of covering the first five kilometers by the end of 2020. However, the MMRC started work in full vigour, with around 2000 labourers and support staff staying in camps around the site. Additionally, work on the part going over the river has also started.

The construction of the Pune Metro from PCMC to Swargate lines started in 2016 and was scheduled to finish by 2022. The work of 10 kilometers in line 1 (17 kms total) and line 2 (15 kms total) combined should have been finished in 2020. Those deadlines are going to be pushed back now.

Similarly, the metro rail construction work in Chennai has resumed after the green light from the government and civic body. This line is supposed to run from Chennai Central to Wimco Nagar, called the Phase-1 extension. The work here has been paused for nearly two months till now.

MMRC project in Pune

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Published By
Rajib Dey
www.constructioncost.co
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European Standards for Aggregates: Chemical

The aggregates utilized in the creation of concrete are inactive granular materials, for example, gravel, squashed stone, sand, slag, reused concrete, and geosynthetic aggregates. The aggregates might be normal, produced, or reused.
In this article, we examine the chemical necessity of the aggregates, for example, chloride, sulfur content, and other chemical constituents according to the European Standards (EN – 12620).
1. Chlorides Content: The water-dissolvable chloride particle content of aggregates for concrete will be resolved as per EN 1744-1:1998, proviso 7, and will, on demand, be announced by the maker.
In the event that the water-dissolvable chloride particle content of the joined aggregate is known to be 0.01 % or lower (e.g., for extrication from most inland quarries), this worth can be utilized in the figuring of the chloride content of concrete.
2. Sulfur Compounds
2.1 Acid Soluble Sulfate: The corrosive solvent sulfate content of the aggregates and filler aggregates for concrete decided as per EN 1744-1:1998, provision 12, will be proclaimed as per the pertinent classification determined in the books.
European Standards for Aggregates: Chemical
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Published By
Rajib Dey
www.constructioncost.co
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Thursday, April 9, 2020

Types of Stairs, Explained

When deciding to build a stair, you need to know what type of stair you want to use. For this, you need to be well versed in stair terminology. Today, we will talk about the types of stairs in use throughout common building practices.

Types of Stairs: The Types of Stairs that are common in residential and commercial buildings are: Straight Stairs, L Shaped Stairs, U Shaped Stairs, Winder Stairs, Spiral Stairs, Curved Stairs, Ladders

Now let us see about them in detail.

Straight stairs: Straight stairs will be stairs without any adjustments in heading. They are certainly one of the most widely recognized sorts of stairs found in both residential and commercial properties. Below are examples of straight floating stairs made with an assortment of stringer styles, railing types, and wood species.

Straight stairs with a central landing: On longer flights of stairs, a landing is embedded to separate the flight. Building codes require this for floor heights over 12 feet. Especially in commercial buildings, straight stairs frequently have platforms halfway up the run of the stairs.

Pros of Straight Stairs:
1. Straight stairs will in general be the most straightforward to go up and down, or, rise/dive, as we state in the industry.
2. They are typically the most effortless to build, in any case, this relies a lot upon the level of detail in the design.
3. Straight stairs only should be associated at the top and the base (no middle supporting structure is required).
4. They function admirably with minimalist designed homes due to their inborn simplicity.
5. By selecting more slender tracks, open risers, and slim metal stringers, straight stairs can be made more straightforward than different sorts of stairs, allowing less obstruction to the view past.
6. No landing is required if the number of risers is held under 16 or the overall vertical tallness is less than 12 feet.
7. It's relatively simple to build railings and handrails for straight stairs.
8. Measuring for railings for straight stairs is simpler than for other stair designs.


Applications of Prestressed Concrete

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Published By
Rajib Dey
www.constructioncost.co
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Friday, April 3, 2020

Design and analysis of Retaining Wall

This construction article presents some useful tips for designing and examining retaining wall for foundation.

Dimensions of base from stress considerations:

The base width b concerning the retaining wall must be selected carefully in order that the ratio of length of the toe slab to the base width should be maintained in such a manner that the stress p1 at the toe should not surpass the safe bearing capacity of the soil.

The topics covered:

1. Design for conventional retaining wall
2. Retaining Wall Design – Proportioning
3. Earth Pressure on Retaining Wall
4. Equivalent Fluid Method
5. Retaining Walls with backfill slope of finite distance
6. Earth Pressure on Retaining Walls with backfill Slope of finite distance
7. Stability of retaining wall
8. Check Against Overturning
9. Check Against Sliding
10. Alternatives for improving FOS against sliding


Staircase Dimensions - How to Calculate Properly

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Published By
Rajib Dey
www.constructioncost.co
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