Clear Cover and Nominal Cover used for RCC Structure

The concept of Clear cover and nominal cover is seen in the Reinforced concrete structures.

Reinforced concrete structures have been main structural materials for over a century and still the most popular material for public structures all over the world. The concrete structure is durable enough to keep its shape for a long time.

The reinforced concrete structure refers to the members like beams, boards, columns, and roof trusses etc. which are consisted of concrete and steel bars.

In these structures, the steel bars are covered by concrete but their mechanical properties will still lose due to the fire to destroy the whole structure.

In this design of reinforced concrete structures, the provided reinforced is inserted in the concrete upto a particular distance from the face of the member as there are some reasons.

The reasons are discussed below:

• It will provide protection to reinforcement from erosion
• It will also provide fire resilience to reinforcement.
​• It will also supply sufficient embedded depth so that reinforcement grows the requisite stress.

This distance is measured in various ways and known by different names like:

• Clear cover: This is the difference from the face of the member to the outermost face of the reinforcement including shear or torsion Stirrups or links.
• Nominal cover: This cover is like the same as Clear Cover although it has different name; actually the name is a term that is used by the code. It is the distance measured from the face of the member to the outermost face of the reinforcement including Stirrups or links.

To get information on other clear cover and nominal cover, go through this useful civil engineering video tutorial.

Video Source: CE&T-Civil Engg & Technology

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Published By
Rajib Dey
www.constructioncost.co
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Details of slab reinforcement on the basis of bar bending schedule

This construction video provides detailed information on slab reinforcement that is created with bar bending schedule (BBS).

Slab reinforcement stands for the method that is undertaken to bend reinforcing steel and transform into shapes necessary for building up reinforced concrete structure.

Bar bending schedule (aka schedule of bars) belongs to a list of reinforcement bars, a specified RCC work item. It is demonstrated in a tabular form for smooth graphical reference.

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Published By

Rajib Dey

www.constructioncost.co

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Demo Of Climbing Formwork System

Climbing formwork denotes an innovative formwork toward vertical concrete structures that develops with the progression of the building. This type of formwork system is ideal for the construction of dams, towers, piers, pylons etc.

The process for setting up of this type of formwork is very complex and expensive. It offers streamlined solution for buildings which are either very iterative in form (like towers or skyscrapers) or necessitate a continuous wall structure (with the use of gliding formwork, a special type of climbing formwork).

Different types of climbing formwork available in the construction industries, which can be either displaced from time to time, or can even shift independently (typically on hydraulic jacks, essential for self-climbing and gliding formworks).

Give below some of the most recognized climbing formworks :-

CR-250: Powerful Climbing Bracket system intended for bigger formwork units. It is mainly applied for pouring of double-sided walls (piers, walls, etc.). The brackets are based on anchor cones, which were implanted in the concrete in earlier pouring phases.

KSP: KSP is ideal for lift and staircase shafts, hollow piers or other types of gaps where it is essential to support formwork panels. This system is usually integrated with customary climbing systems at the outside of the wall.

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Published By

Rajib Dey

www.constructioncost.co

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Precast Concrete Advantages

In Precast concrete, a concrete member is casted and cured in a recyclable mold or "form" under a controlled environment and transmitted to the construction jobsite and elevated into place. On the other hand, the standard concrete is poured into site-specific forms and cured on site.

Precast concrete provides the following benefits :-

1. The precast concrete is developed with advanced quality concrete with greater technical control on the production of concrete in factory.

2. The material of precast concrete contains essential properties of thermal inertia (facilitating a more persistent temperature both in cold and hot regions) and acoustic insulation

3. The thermal mass indigenous to precast concrete makes itself energy efficient and minimizes the heating and cooling peaks and loads

4. Pre-stressing can be done smoothly to diminish the size and number of the structural members.

5. It is not mandatory to have joints in the precast construction.

6. Precast concrete structures are totally reusable and reduce the whole life cycle impact on the environment

7. Precast Concrete is completely safe to withstand impacts, blasts and natural disasters like earthquakes, tornadoes and floods.

8. Precast Concrete is developed with natural raw materials likw stones, gravels, sand, cement and these materials are accessible to almost everywhere and in a bulk quantity

9. The moulds used for generating the precast units are made of steel containing perfect dimension in all directions. These moulds are long-lasting and can be utilized repeatedly.

10. If necessary, the precast structures can be easily separated and can be used aptly anywhere.

11. Get rid of carrying and accumulating different types of concrete components for cast in situ work while selecting precast members.

12. Various precast units can save huge time for completing a construction quickly.

13. While setting up precast structures, the amount of scaffolding and formwork is significantly minimized.

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Published By

Rajib Dey

www.constructioncost.co

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RC design with Beam, Column and Slab through STAAD.Pro

This construction video offers live online training for creating the design of Beam,column,slab for a Reinforce Concrete Structure. This tutorial is specifically designed for advanced users.

This construction program is used to design all sorts of structures as well as distribute your synchronized model data secretly between your whole design team. With STAAD.Pro, it becomes easier to complete various complicated construction projects like steel, concrete, timber, aluminum, and cold-formed steel projects in schedule time and on budget. The structures can be designed efficiently with the use of more than 80 international codes.

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Published By

Rajib Dey

www.constructioncost.co

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Design of Reinforced Concrete Structures – An exclusive ebook for civil & structural engineers

N. Subramanian has written an exclusive ebook alias “Design of Reinforced Concrete Structures”. This construction ebook is intended to fulfill the requirements of the students who desire to register their names with the undergraduate civil and structural engineering programs.

The book primarily focuses on the design of Reinforced Concrete Structures with emphasis on concrete properties, structural elemental designs together with compression and tension members, beams and slabs and flexure designing, shear torsion, uni-axial and biaxial bending and interaction amid such forces.

In each chapter there are solved examples, review questions, practice questions together with plentiful examples supported with brief texts, a massive list of addendums on strut-and-tie-method, soil properties, as well as realistic tips and tricks which enhance the intensity of the contents in the book.

Besides, there are discussions on chemical admixtures, water, mineral admixtures, cement hydration, concrete types, sifcon and simcon, ferrocement, steel reinforcing, corrosion of rebars, cube and cylinder tests which are given in Chapter 1. In chapter 2, there are topics like floor and roof systems, basic structural elements and other such associated studies.

The contents of the book adheres to the present Indian code of practice (IS 456: 2000). Some of the obsolete provisions are substituted with the American code provisions.

Buy it now Design of Reinforced Concrete Structures

Image Courtesy: amazon.in

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Published By

Rajib Dey

www.constructioncost.co

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Bubble deck slab system can reduce your building cost significantly

Bubble deck slab belongs to the kind of slab where bubbles or ellipsoid, formed with waste plastic material, are used to replace some portion of the concrete to lessen the self-weight of the structure.

This type of slab is designed by following the Euro and the British codes. In 1990, JORGEN BREUNING had developed a new system where ellipsoids are locked amid the top and bottom reinforcementmeshes and a natural cell structure is formed similar to a solid slab.

The slab is made having the same features of a solid slab, but contains significantly less weight because of the reduction of unnecessary concrete.

Bubble deck slab system was first introduced in The Millennium Tower in Holland.

Advantages of Bubble Deck Slab System:

• Preserves 30 to 50 % weight than a equivalent solid slab – equal stiffness.

• 20% concrete lessening in other components.

• The decreased weight of the slab will lead to a modification in design to longer spans and/or condensed deck thickness.

• It can be easily used with seismic as it minimizes the total weight of the building.

• Minimize concrete usage – 1 kg recycled plastic substitutes 100 kg of concrete.

• With this system the cost of the building is decreased by 8 to 10 %.

Image Courtesy: blog.archpaper.com

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Published By

Rajib Dey

www.quantity-takeoff.com

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How to use RCsolver software program to make the design of 2-way reinforced concrete slab

Dimitrios Mamoglou, the renowned engineer and software developer, has presented an exclusive video for construction constructor & construction estimator. This video shows how to design a two way reinforced concrete slab through RCsolver software program by following Eurocode 2 specifications.

RCsolver is the kind of software that is used to create the design and computation of reinforced concrete structural members. It makes all the calculations defined in the Eurocodes and ACI 318-11 toward the tensile and shear reinforcement of the structural members.

RCsolver helps the users to have a 3D digital view of the members and the reinforcement rebars. It is combined with Eurocode 2 and 8 specifications, together with the national annexes specifications concerning a great amount of European countries. The latest version of RCsolver consists of the ACI 318-11 specifications focusing concrete member design.

Eurocode 2 and EC2 are both short forms for BS EN 1992, Eurocode 2: Design of concrete structures. There exist four parts to BS EN 1992 but while referring to Eurocode 2 a good number of people suggest BS EN 1992-1-1 general rules and rules for buildings.

For more information, visitwww.eurocode2.info

A 15-day free trial version is available for users.

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Published By

Rajib Dey

www.quantity-takeoff.com

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Formwork for Concrete Structures - An exclusive e-book for construction engineers

Garold (Gary) Oberlender and Robert Peurifoy have jointly published an exclusive e-book alias Formwork for Concrete Structures. The book contains total 544 pages and available in kindle edition. This construction book is very useful for construction engineers, civil and structural engineers, architects, and contractors as it briefly explains the formwork design concept, materials and methods for concrete structures.

Formwork for Concrete Structures (Fourth Edition) presents most up-to-date information on designing and producing formwork and temporary structures while the construction progression is going on. The book is specifically created with the newest structural design proposed by the National Design Specification (NDS 2005). The book highlights the latest improvements toward materials, money- and energy-saving policies, safety standards, OSHA regulations, and dimensional tolerances. The latest sample problems demonstrate realistic applications for working out loads and stresses. This book also contains most updated summary tables and equations as well as a directory of suppliers.

The readers will get current information on forms for footings, walls, columns, beams and floor slabs, concrete floor sytems, thinshell roof slabs, architectural concrete, concrete bridge decks, flying decks, and much more.

The book covers the following topics :-

• Economy of formwork
• Pressure of concrete on formwork
• Properties of form material
• Form design
• Shores and scaffolding
• Failures of formwork
• Forms for footings, walls, and columns
• Forms for beams and floor slabs
• Patented forms for concrete floor systems
• Forms for thin-shell roof slabs
• Forms for architectural concrete
• Slipforms
• Forms for concrete bridge decks
• Flying deck forms

The book is available in Amazon

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Published By

Rajib Dey

www.constructioncost.co

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Estimator - Concrete Structures

Our client is an international post tension contractor specialising in the construction and remediation of concrete structures with projects ranging in value from $1 - 20m.

These projects include bridges, floor decks and tilt up panel both precast and poured in situ.

Due to company expansion they are seeking an Estimator to join their small but proactive office to estimate from first principle on new and remediation projects which will cover all aspects of remediation including stressing, grouting, painting and sand blasting.

This opportunity would suit someone from a specialist second tier concrete or civils contractor looking to make an impact in a growing company.

Due to this opportunity being an integral part of the company's growth plans our client requires candidates to have the following as a minimum:

• Tertiary Educated In Civil Engineering.
• Minimum 3 yrs Estimating Experience.
• WA / Local Contracting Experience Essential.
• Specialist Contractor Experience Advantageous.
• Ability To Work On Own Initiative.
• Proven Experience In Similar Role.

If you possess the above experience, skills & qualifications apply to Andy Stewart by emailing your CV in WORD format not PDF toandy@tognetti.com.au or phone me directly for a confidential discussion on 08 9322 3088.

Salary: $105,000 (pa)

You can also submit your resume by clicking on APPLY.

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Published By

Rajib Dey

www.quantity-takeoff.com

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