6 helpful tips to avoid common construction delays

Construction area is a risky and high alert area. Any minor injury or accident can happen for a moment of distraction. Sometimes construction works get delayed and as a result the cost and problems create. There are many reasons of this delay; it can be happen for the communication gap, wrong planning, poor management or the unwanted raised blockers. Whatever may be the reason the result is same, the unwanted delay. This article is an overview of the problems and their solutions.

 

Most of the construction projects go out of control and costs back for the inability to finish the work on time. So it is important to be in schedule for maintaining the budget, but the industry is full of uncertainties so it is not possible. There are few tricks that can be used by the managers to avoid the crippling delays. The tricks are described below:

  1. Minimize construction delays and blockers: The two types of problems prevent projects from finishing on time are delays and blockers. A construction delay happens generally when the things don’t go with plans; and as the construction is sometimes consecutive, it is often unavoidable. The cause of delay can be the absence of the subcontractor in the case of longer time work or delayed material shipments. Blockers are not like delays as it is a work whose completion is needful before other tasks could be completed. The best thing of avoid delaying is careful planning and the blockers should be identified at first.
  1. Improve your management method:Inefficient management is another big reason for any project failure. Project managers are given the responsible to create that kind of project plan which has all the necessary elements and also deliver the completed project by the deadline. Sao the construction manager has several responsibilities and has to coordinate with the labors and materials in the job site for completing the work on time.A manager becomes great only when he can do the work before time with the problems and blockers.
  1. Plan, plan, plan:A great project plan can be done when the project manager is always updated with the planning and enable quickly diagnose potential challenges and solve problem instantly before any delay. Many contractors start their projects without clear timeline or prior communication etc. and it is a big mistake. The project should always contain with the details and variables to avoid the delays. A successful plan always has unforeseen circumstances, clear guideline to finish it in right time. The software like eSUB or other software options can maintain the project planning.
  1. Assign clear roles and responsibilities:The commercial construction projects have contractors, employees, subcontractors, managers and other peoples. And for any kind of failure, each party is equally responsible. Avoiding critical tasks lead the projects in delay. By establishing roles, responsibilities and focusing on the goal, the unwanted delays can be avoided. To get buy-in from everyone before beginning any project plan is essential. By talking with all the key players in a project, the involvement of the members in the project can be seen.
  1. Schedule contractors far in advance:Two co creators of HGTV’s hit TV-show Property Brothers, Drew and Jonathan Scott have launched a venture called Dream Homes that addresses the problem about the timing for settle down a new project. Bridget McMullin of McMullin Design Group also warned that the contractors, designers and architects often delayed their work for the setting of the first meeting. To avoid delays and costs, you need to determine the time and the contractors. To complete all the process from arranging meeting to choosing contactors and making schedules, you need 3 months. So it is always better to be active in doing this entire works.
  1. Establish clear communication between parties: The poor communications between two parties can turn the little problems into big delays. In the certain created challenges it becomes crucial to contact directly between the contractors and project management team. So as a contractor you must quickly diagnose asses and communicate with all eth members to make a solution. A guide of timely project completion by Design Blendz shows the benefits of good communications. The active participation of all the employees makes any project successful and completed in time.

Though the construction project management software has made it easier than earlier to deliver the right updates from the site to all the key stakeholders but this should be maintained properly. This practice can bring everyone in the same page and the production of work can be done faster.

For more information please follow the link: blog.capterra.com

6 helpful tips to avoid common construction delays

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Published By
Arka Roy
http://www.constructioncost.co
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Benefits of drones in construction

Drones are rapidly changing the industry scenario, especially in the fields of civil engineering and surveying. They are reaching the odd locations that are untouched by the human resource. The application of this technology, though, goes beyond these two names. They are strongly imprinting their values across the industry, from real estate to golfing. The achievements earned by this technology are countless, and they deal with toughest challenges with ease and bring out the productive result for the companies. The content explains in brief how they earned this unmatched reputation in the dynamic world.

Observation:

Navigating the difficult location in the construction field is no longer a tricky job. Unmanned Aerial Vehicles are performing the job as skillfully as no one can do. It sends images of what it observes to the planning team.

The data sent by drones contain impressive details of the objects, including the smallest option. The 360 degree panorama views help civil engineers divide the work as per the priority basis. Operators also share these images in order to come up with a better plan. The data solve various complex issues like project timing, equipment needs and prevailing challenges of a construction.

Surveying:

Drones play major roles for surveying. They quite satisfyingly assist Geographical Information System (GIS) professionals. GIS is known for their services like locating boundaries of the property, subdividing land and surveying construction sites. No doubt to say, drones have already made loud noises for catering the same functions proficiently and flawlessly. They send still images of a construction map to a cloud-based storage from where authorities can access and assess the data to plan meticulously. Since the cameras and the distance can be regulated remotely, they rise above than natural and artificial obstacles.

Costing:

Drones are affordable and accurate, and this is why they are entering the industry at large. The benefits are countless and at the same time reliable. They accelerate the production, assess the present situation and help in figuring out the problem more efficiently than any other does. Traditionally, construction has been the manpower controlled field. With the introduction of this technology, the age-old thought starts getting obsolete. They use the human – resource team in a profitable way and cut down the unnecessary expenses.

Drones have already made their presence felt in the industry with offering profits more than expected. Getting real time data of the construction has become easier. Thus, it also solves many difficult challenges prevailing over the field.

However, there exist regulations, probable risks and service options to take into consideration prior to launch a drone program.

To get more information, click on the following link computerworld.com/

Various types of tests conducted to verify the quality of aggregates in road work

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Arka Roy
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Various types of tests conducted to verify the quality of aggregates in road work

Aggregate is a vital element in pavement construction. The load transfer capacity of pavements is significantly impacted by the aggregated. So, it is recommended to examine the aggregates comprehensively prior to utilize them in the construction site.

The aggregates should contain the properties like durable and long-lasting with perfect shape and size so that the pavement can function monolithically. Aggregates are evaluated for strength, toughness, solidity, shape, and water absorption.

In order to decide the suitability of the aggregate for use in pavement construction, The following tests are conducted to check whether the aggregates are suitable to be utilized in pavement construction:
In order to decide the suitability of the aggregate for use in pavement construction, The following tests are conducted to check whether the aggregates are suitable to be utilized in pavement construction:

1.CRUSHING TEST: Crushing under compressive stress is a model to check the eligibility of pavement material for getting passed or failed. A test is organized with IS: 2386 part-IV and applied to find out the crushing strength of aggregates. The aggregate crushing value offers a relevant measure of resistance to crushing under increasingly employed crushing load.

2.ABRASION TEST: Abrasion test is accomplished to examine the rigidity of aggregates as well as determine whether they can be used for various pavement construction works. Los Angeles abrasion test is mostly suitable for executing the hardness property and it is implemented in India (IS: 2386 part-IV).

3.IMPACT TEST: The aggregate impact test is accomplished to verify the resistance to impact of aggregates. Aggregates which have passed 12.5 mm sieve and conserved on 10 mm sieve is filled with a cylindrical steel cup having internal dia 10.2 mm and depth 5 cm that is connected to a metal base of impact testing machine. The material is covered with 3 layers where each layer is tamped for 25 numbers of blows. Metal hammer having weight 13.5 to 14 Kg is set to drop with a free fall of 38.0 cm through vertical guides and the test specimen is dependent on 15 numbers of blows.

4.SOUNDNESS TEST: Soundness test is conducted to analyze the resistance of aggregates against weathering action, by carrying out accelerated weathering test cycles. The Porous aggregates is dependent on freezing and thawing is liable to decompose beforehand. To determine the stability of such aggregates, they are dependent on a faster soundness test as stated in IS: 2386 part-V.

5.SHAPE TESTS: The particle shape of the aggregate mass is set with the proportion of rough and enlarged particles in it. Large and enlarged aggregates may be damaged to higher workability and stability of mixes.

6.SPECIFIC GRAVITY AND WATER ABSORPTION: The design of concrete and bituminous mixes is mostly based on the properties like specific gravity and water absorption of aggregates. The specific gravity of a solid refers to the proportion of its mass to that of an equivalent volume of distilled water at an indicated temperature. As the aggregates may include water-permeable voids, so the following two measures of specific gravity of aggregates are utilized:

  1. Apparent specific gravity and
    2. Bulk specific gravity.

7.BITUMEN ADHESION TEST: Bitumen is compatible with all general types of road aggregates on condition that they are dry and do not contain dust. Without water, no adhesion issue of bituminous construction occurs.

If the aggregate is wet and cold, the adhesion issue may happen. This issue can be handled by eliminating moisture from the aggregate by drying and raising the mixing temperature. Besides, the existence of water leads to removal of binder from the coated aggregates. This problem happens if bitumen mixture is absorbent to water.

To get more information, click on the following link civilblog.org/

Various types of tests conducted to verify the quality of aggregates in road work

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Published By
Arka Roy
http://www.constructioncost.co
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Brief explanation of rebaring method in reinforced concrete construction

Rebaring technique in reinforced concrete construction stands for a process that is undertaken for fabricating and arranging of reinforcement bars perfectly based on the design and drawings intended for RCC works.

It is known fact that concrete is very durable in compression and weak in tension. The reinforcement bars alias rebars are strong in tension and these are combined with concrete to employ its tension property.

The responsible engineer produces the calculation of reinforcement bar for a reinforced concrete work. The engineer supplies us the particular details of the number of reinforcement bars as well as the shape and size of each bar for each work.

The responsible engineer produces the calculation of reinforcement bar for a reinforced concrete work. The engineer supplies us the particular details of the number of reinforcement bars as well as the shape and size of each bar for each work.

Various types of loads like tension, compression, lateral, horizontal and torsion are available which develop from pressure. To determine the strength of concrete, you have to find out whether concrete can withstand these loads or not.

The strength obtained by the R.C.C structure is based on the method and the techniques to be used for setting up the reinforcement bar. The reinforcement bars are primarily patterned over its surface to allow perfect bonding with the concrete.

Importance of Rebaring Technique in Reinforced Concrete Construction: The steel reinforcement usually is segregated into two categories i.e.

  • Primary Reinforcement or Main Steel reinforcement
    • Secondary reinforcement or distribution reinforcement

The objective of applying main steel reinforcement bars in R.C.C structures is to maintain resistance capacity for withstanding the entire design loads delivered to it. The secondary reinforcement bars are primarily used to maintain longevity and elegant look.

This reinforcement ensures to keep resistance for localized areas like limited cracking. These can also combat the stresses produced because of divergences in temperature.

The main bars which are used with indicated diameter, are bent at the ends. The stirrups belong to reinforcements which are arranged laterally, to place the main bars of the structural elements like beams and columns, in exact location.

The stirrups may come in various shapes like circular, square, rectangular, helical or diamond on the basis of the cross-section of the structural element. The reinforcement bars in the corners may appear as L – shaped.

The caging for the structural element to be decided should be perfectly fastened so as to keep the position of each bar unchanged throughout concreting. This is a check that should be always maintained throughout concreting otherwise it can hamper the stability of the structural member.

The rebars are primarily arranged at the junctions where the formwork of the structural element is closed and at the point where a new structural element should be fastened with the former one.

To gather more information, click on the following link theconstructor.org

Brief explanation of rebaring method in reinforced concrete construction

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Details of technical specifications of bitumen macadam & bitumen concrete for any road work

This construction video briefly explains the technical specification for bitumen macadam and bitumen concrete essential for any road work.

Bitumen Macadam alias Asphalt Concrete is formed by blending aggregate, filler and bitumen and come in solid, medium or open graded on the basis of the end application.

Macadams are categorized into three primary layer categories like Base, Binder and Surface Course. It is applied as a binder course for roads where lots of heavy commercial vehicles pass through as well as a closed-graded premix materials exist with voids content 5-10 per cent. It has strong and long-lasting surface.

Bituminous concrete refers to a sort of construction material that is employed for paving roads, driveways, and parking lots. It is formed by mixing stone and other forms of aggregate materials combined jointly through a binding agent. This binding agent is known as “bitumen” and is a by-product of petroleum refining. It contains a dense, sticky texture like tar once heated, then develops a thick solid surface as soon as it gets dried. Bituminous concrete is also extensively recognized as asphalt in various parts of the globe.

This material does not include cement. It has typical black appearance. It is frequently placed right over a gravel base layer to build up new roads and parking lots, but may also be poured over prevailing concrete to patch-up or smooth out bumps and voids.

As soon as the bituminous concrete are poured onto the roadway, the surface is leveled and compacted through a large paving machines.

For Bituminous Macadam :-
1) Grade of bitumen should be vary from 60 to 70

2) Temperature at different stages :-
a) At the time of blending materials maximum temperature should be 1650C
b) At the time of laying, the temperature should be 1250C
c) At the time of rolling, the temperature should be 900C

 

3) Levels (tolerance) – At the time of rolling, the layers should be +6 M to -6 M.
4) Field Density Test – Here, compaction should be 98%; 1 test per 250 m2 of area.

To get the complete details, watch the following video.

Details of technical specifications of bitumen macadam & bitumen concrete for any road work

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Published By
Arka Roy
http://www.constructioncost.co
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The uses of excavation supports or earth retaining structures

Excavation support or earth retaining structures are vital where deep excavation is created and arrangement of necessary slope is not possible. Given below, the details of different types of excavation supports.

What Are Excavation Supports?
Usually, to develop a structure either over the ground or underneath the ground, excavation of soil should be arranged in the ground.

The excavation may come in the form of shallow or deep on the basis of our need. But when the soil is dug deeply, there is a chance for collapsing of the soil from the sides of excavated area because of low strength.

To get rid of this issue and to create the cut vertically perfect, some temporary earth retaining structures known as excavation supports are essential.

The soil cut failure occurs if the limit of excavation surpasses its safe height limit and it is subjected to unconfined compressive strength of soil and cohesion.

From the table, given below, the safe height limit for various soil types are given on the basis of their unconfined compressive strength and cohesion limits.

Types of Excavation Supports: Usually, the following methods are mostly used for providing excavation supports-

• Soldier pile and lagging
• Soil nailing

Soldier Pile and Lagging: Soldier piles refer to I-sections which comprise of web among two flanges. These I-sections are drilled into the ground encompassing the boundary of an excavation. The piles are delivered to the point slightly under the necessary excavation depth.

The concrete with poor strength is utilized for the purpose of grouting of piles. The gap among each two nearby piles is restricted to 10 feet. Once that exaction is completed, the flanges of piles provide good support to the surrounded soil.

Wood lagging is applied among the piles. The lagging comprises of long timber sheets or planks which are arranged behind the front flanges of piles to provide well support to the soil among the piles.

The timber contains 2 to 4 inches depth, there, some excavation should be arranged by hand behind the front flange. To create stable bond among horizontal wood sheets and front flange, welded studs, clips etc. are utilized.

The uses of excavation supports or earth retaining structures

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Reinforcement details for slabs-on-ground with crack control factors

While designing the slabs, which are built up on ground, the crack control factors should be taken into account. Given below, reinforcement details for slabs-on-ground.

The density and the design of the slabs-on-ground are dependent on the cracks which are developed because of the external loading. The calculation for slab thickness is made on the basis of the suppositions of a slab being unreinforced and un-cracked.

For specific situations of slabs on ground, the steel reinforcement can offer a great solution. The characteristics of this method contains the following :-

1. The limiting of cracks occur because of shrinkage
2. Apply bigger joint spacing that is larger than the unreinforced slabs
3. The possibilities for cracks development may be avoided by provision for moment capacity and constancy for those areas.
4. Cracking can’t be resisted with the integration of reinforcement. These elements allow in minimizing or adjusting the produced crack width by genuinely raising the frequency of cracks that is created.

If a reinforcement design is proportioned and arranged perfectly, it can allow to restrain the width of the crack significantly and therefore the serviceability period of the slab is not impacted.

Thickness Design Methods for Slabs-on-Ground Construction

When reinforcement in the slab design is applied increasingly, the un-cracked strength of the slab is slightly affected. The various methods for thickness design like Pickett’s Analysis Method (PCA), WRI (Wire Reinforcement Institute) Design Method and COE methods can be employed for creating the design of slabs on ground with reinforcement.

Reinforcement for Slabs-on ground for Crack Width Control Only

The width of crack can be restrained by reinforcement on the basis of the two factors like the joint spacing and the thickness of the slab. Otherwise we can define the crack width control as a function of joint space and slab thickness.

There should be a minimum steel ratio of 0.5% of the slab cross section to facilitate the saw cut of contraction joints to be removed.

When the reinforcement is arranged, it is suggested to set the reinforcement bars nearer to the surface of the slab top surface devoid of compromising the minimum concrete coverage over the reinforcement.

Reinforcement details for slabs-on-ground with crack control factors

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7 Basic Tests of Bricks to ensure it’s quality

This construction video tutorial briefly explains what the most important brick test procedures are generally undertaken in the construction jobsite.

The details of the tests are given below :-

Compressive Test – It is performed to verify the strength of a brick. Under this test 5 samples of bricks are chosen randomly and sent them to laboratory and apply pressure on various bricks through a crushing machine. Now, take the average of all the results produced. If the averages is similar to 3.5 N/mm2, the quality of the bricks are good.

Water absorption Test – Under this test the bricks are selected in completely dry condition and taken their weight as W1. Then submerge them in water for 24 hours. Again, taken their (wet bricks) weight after 24 hours and named them as W2. Now find out the average with the following formula :

Water Absorption % = W2 – W1/W1 x 100

The recommended absorption rate should be between 15% – 20% for a good quality brick.

Impact Test – This test ensures the proper bond in a brick so that it can’t break easily. Under this test few bricks are selected and dropped them from a height of 1 meter.

If the bricks are broken, then impact test will come as failed. Contrarily, if these bricks are not broken, the test result will be considered as passed and the bricks are considered as good quality bricks.

Dimension Tolerance Test – In this test shape, size and colors of the bricks are checked. Under this test, 20 bricks are selected and arranged in a straight line. Then we take a sample of standard brick and tally it’s size, shape and color with the bricks arranged in a straight line. If they match with the sample bricks, the bricks should be treated as good quality bricks.

Soundness Test – In this test two are chosen randomly and hit with each other, if metallic sound is produced and the bricks remain unbroken then these bricks are considered as good quality bricks.

Hardness Test – In this test, a metal or other object is used to put scratches on the bricks. If scratches are not produced, then these bricks are hard and treated as good quality bricks.

Structure Test – In this test, a brick is chosen and broken from the middle, if there are no cracks, holes, impurities found inside the bricks, then the structures are strong and these bricks are treated as good quality bricks.

To watch online demonstration, go through the following video tutorial.

7 Basic Tests of Bricks to ensure it’s quality

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Some useful tips to develop and pour concrete stairs

The renowned concrete contractor, David Odell, has presented an exclusive construction video tutorial that provides some useful construction tips on how to develop and pour concrete stairs (10 steps of stairs).

These are the basic steps for developing concrete stairways. This video will guide you to build up your own concrete stairs. Steps shown in this video comprise of laying out the size, arranging the sub-base, developing the forms, pouring, finishing and curing the concrete from starting to completion.

A “riser” refers to the vertical surface of the step and a “tread” refers to the horizontal surface of the step. To define the whole size of the concrete stairs, initially, you should work out the total rise and run of the steps you are going to form.

To learn the complete process, watch the following video tutorial.

Some useful tips to develop and pour concrete stairs

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Published By
Arka Roy
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KaderColumn – A useful construction program for column analysis

KaderColumn is a powerful construction program that is created for reinforced concrete tied short columns.

It can be used to create the designs of columns based on up to eleven cases of loading comprising of axial load and bending moment implemented about the maximum principle axis.

The program allows to build up the column strength interaction diagram (Bending moment-Axial load curve) out of the input data of the cross-section and verify whether all input cases of loading are situated inside the design curve. If the input data of the cross-section is insufficient, the program enhances them to commence from the Min. Roh to the cross-sectional dimensions unless all input cases of loading remain inside the design curve. The program provides proposition for setting ties properly and draws them.

Features:

  • It is very user-friendly and short.
    • It computes and draws the column strength interaction diagram toward a reinforced concrete tied short column having a rectangular (containing rebars at two sides only or at all four sides), square or circular section and depending on axial load and bending moment around the max. principle axis of its cross-section.

 

  • Up to eleven cases of loads (axial load and bending moment) are permissible. The program examines all these cases which should remain inside the column interaction diagram.
    • It designs the section and draws by organizing ties in an efficient manner.
    • The user will be capable of rectifying the section dimensions, the min. and max. ratio of reinforcement and some other parameters for obtaining the rational section from his point of view.
  • The user will be able to save and open the input data file that is already saved by the program.
    • The program employs the ultimate strength method for design and abides by the exact ACI 318-02 Code requirements.

To download this construction program, visit the developer’s website www.cadkad.com

KaderColumn – A useful construction program for column analysis

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