Civil Engineering: Reinforced Concrete

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A Cantilever slab is a structure that is fixedly supported at one side

Note: Careful while detailing your reinforcement

1- You know the dimension of your slab ( Thickness, Width, and length ). then Go for Load Analysis to get the maximum design load combined in KN/m or

2- Next go for structural Analysis to get your maximum forces (i.e maximum shear and moment )

3- Then calculate the minimum area of reinforcement required. Also, calculate the minimum area of reinforcement and compare the two.

4- Detailed your reinforcement arrangement. ( provide more at the area of the maximum bending moment )

5- Check for shear. if shear reinforcement needs to be provided or not.

6- check for deflection.

However, An easy way is to use design software such as Staad, ETABS….. and so on. using the software can give you everything within 15 minutes.

SNRN 4/07/2021 Admin Bandung Indonesia

How can we design a cantilever slab?

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4/07/2021

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A Cantilever slab is a structure that is fixedly supported at one sideNote: Careful while detailing your reinforcement1- You know the dimension of your...

Is there a way to connect a new reinforced concrete slab on an existing reinforced concrete beam, given that the beam doesn't have steel dowels to connect with?

Yes its possible, but I agree with Greville Wood’s answer and genuinely don’t think he is touting for work.

Depends on the loads involved and connecting to the existing set concrete needs specific techniques and materials. Plus you won’t know the reinforcement on the existing beam. It’s a recipe for an expensive mistake.

The safest way is to break back the concrete to establish what reinforcement exists, that way you can physically reconnect to the existing concrete providing it hasn’t degraded or spalled.

The existing concrete will have to be primed and the new concrete replaced, not always easy. The new concrete may have to be polymer modified. That why it is best to check with an engineer.

SNRN 4/07/2021 Admin Bandung Indonesia

Is there a way to connect a new reinforced concrete slab

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4/07/2021

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Is there a way to connect a new reinforced concrete slab on an existing reinforced concrete beam, given that the beam doesn't have steel dowels...

Design of highway bridges based on AASHTO-LRFD

Introduction to bridge engineering

- Wooden bridge

- Metal truss bridge

- Suspension bridge

- Metal arch bridge

- Reinforce concrete bridge

- Girder bridge

Bridge specification and design standard

All software and resources in the SONATUTS directory are the property of their respective authors. All downloadable or viewable content available on SONATUTS is provided as-is. You agree that you bear sole responsibility for your own decisions to download or use any of the software listed.

SNRN 3/15/2021 Admin Bandung Indonesia

Design of highway bridges based on AASHTO-LRFD

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3/15/2021

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Design of highway bridges based on AASHTO-LRFDIntroduction to bridge engineering- Wooden bridge- Metal truss bridge- Suspension bridge- Metal arch bridge-...

What is a rebar coupler?

Rebar couplers are used in reinforced concrete structures to the connection steel bars that replace a normal rebar lap joints. The rebar couplers are very useful for reinforced concrete structure columns and walls. The rebar coupler comprises a piece of rebar furnished with a string, and a coupler sleeve at the correct end as seen toward an establishment. In development joints, rebar couplers can be utilized to supplant all bits of the rebar experiencing the form work. Rebar couplers are utilized for joining rebars with a full tensions capacity. The closures of bars to be joined are furnished with strings, and the bars are joined utilizing a coupler sleeve that moves the power on the rebar across the association.

Type of rebar coupler

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What is a rebar coupler?

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3/06/2021

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What is a rebar coupler?Rebar couplers are used in reinforced concrete structures to the connection steel bars that replace a normal rebar lap joints....

Teaching Reinforced Concrete Design With Mathcad Application. The design of various components of a building structure is performed based on the

- American Concrete. Institute (ACI) Building Code 318

- AASHTO – The American Association of State Highway and Transportation Officials

- American Society of Civil Engineers (ASCE 7)

- International Building Code (IBC)

Introduces the fundamentals of reinforced concrete design in a clear and comprehensive manner and grounded in the basic principles of mechanics of solids

This book prepared by Engineering and Technology Center (ETC)

If you want to buy Original book for support author

Please contact ETC for more information

SNRN 3/05/2021 Admin Bandung Indonesia

Design of Reinforced Concrete Khmer Language (ETC)

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3/05/2021

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Teaching Reinforced Concrete Design With Mathcad Application. The design of various components of a building structure is performed based on the -...

What is the lap length?

It is the length provided to overlap two rebars in order to safely transfer load from one bar to another bar and alternative to this is, to provide mechanical couplers.

What are the general rules for lap length?

For the different diameter of bars

When the bars of different diameters are to be spliced the lap length is calculated considering the smaller diameter bars.

Suppose you are constructing a column, from bottom 20 mm diameter bar is coming and from here 16 mm diameter bar has to be spliced then for calculating lap length 16 mm diameter should be considered and not 20 mm.

What is the minimum lap length?

For direct tension, the straight length of the lapping bar shall not be less than 15d or 20 cm. While in the case of compression lapping should not be less than 24d.

What is the difference between lap length and development length?

Lap length is provided to safely transfer stresses from one bar to another, while development is needed to safely transfer the stresses from steel bar to concrete to make a continuous structure.

Where lap length is provided in column?

The bending moment at the middle portion of the column is zero it means the middle portion of the column is least stressed. Hence, lapping should be provided in the mid-section of the column.

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What is Lap Length?

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2/14/2021

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What is the lap length?It is the length provided to overlap two rebars in order to safely transfer load from one bar to another bar and alternative...

Standard test on fresh concrete

Slump Test
Flow Test
Compacting Factor Test
Ve Be Time Test
L-Box Test
J-Ring Test
V-Funnel Test
Orimet Test

All software and resources in the SONATUTS directory are property of their respective authors. All downloadable or viewable content available on SONATUTS is provided as-is. You agree that you bear sole responsibility for your own decisions to download or use any of the software listed.

SNRN 12/28/2020 Admin Bandung Indonesia

Standard test on fresh concrete

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12/28/2020

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Standard test on fresh concrete Slump Test Flow TestCompacting Factor TestVe Be Time TestL-Box Test J-Ring TestV-Funnel TestOrimet...

Slab consists of two types which are one way slab and two way slabs.

One way slab has two types namely simply supported slab and one way continuous slab. While two way slabs also consist of two types namely simply supported two way slab and constrained slab. Slab types can be decided through side ratio calculation through BS8 110 reference such as:

Ly / Lx <2.0 (two way)
Ly / Lx > 2.0 (one-way)

with Ly was longer side and Lx was shorter side.

A slab is called one-way if the main reinforcement designs within one direction only.

This situation happens if slab is supported only on two sides only. If slab were supported at all four sides, slab will become one way if long span ratio (Ly) to short span (Lx) is exceeding 2. Because of slab string one-way then reinforcement in span direction is main reinforcement, while reinforcement in direction perpendicular by span known as second reinforcement which functions as binding main reinforcement and help stress distribution because of temperature changes and concrete shrinkage.

Download Excel Spreadsheets

SNRN 12/19/2020 Admin Bandung Indonesia

One Way Slab Design Spreadsheets to Eurocode 2

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12/19/2020

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Slab consists of two types which are one way slab and two way slabs.One way slab has two types namely simply supported slab and one way continuous...

An overhead crane, commonly called a bridge crane, is a type of crane found in industrial environments. An overhead crane consists of parallel runways with a traveling bridge spanning the gap. A hoist, the lifting component of a crane, travels along the bridge. If the bridge is rigidly supported on two or more legs running on a fixed rail at ground level, the crane is called a gantry crane (USA, ASME B30 series) or a goliath crane (UK, BS 466).

Unlike mobile or construction cranes, overhead cranes are typically used for either manufacturing or maintenance applications, where efficiency or downtime are critical factors.

SNRN 12/06/2020 Admin Bandung Indonesia

Overhead Steel Crane Support Details

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12/06/2020

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An overhead crane, commonly called a bridge crane, is a type of crane found in industrial environments. An overhead crane consists of parallel runways...

Reinforced Concrete Stairs Cross Section Reinforcement Detail This is a typical Reinforced Concrete Stairs Cross Section Reinforcement Detail, in CAD drawing that needs to be included alongside with every structural drawing that includes a concrete staircase to show correct reinforcement placement at the start, middle and landing part of the stairs. Purchased product contains : .dwg file .dxf file .pdf file fully customisable A MUST HAVE DETAIL One of the most useful structural details when designing for reinforced concrete. This CAD dwg drawing for an RC staircase reinforcement detail will come handy and save you time almost in all projects. Essential typical structural detail for most staircase designs. DETAILED CAD DRAWING main top & bottom reinforcement transverse reinforcement middle landing support detailing non-reinforced tread step foundation starters reinforcement.

SNRN 12/06/2020 Admin Bandung Indonesia

Stair Reinforcement Details

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12/06/2020

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Reinforced Concrete Stairs Cross Section Reinforcement Detail This is a typical Reinforced Concrete Stairs Cross Section Reinforcement Detail, in...

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