All You Want Know About Inverted Beam - Lceted Institute

Inverted Beam known by several alternative names as UP-turned beam and inverted T beam,

The Inverted beams are the same as Regular beams, except that the position of the slab varies. Usually, the Regular slab is positioned near the top of a beam and the tops of both the beam and the slab are kept the same level. This gives the junction a T-shape. This type is generally preferred for two reasons

1. It is economical

2. It provides an air surface for the upper level that can be used on multiple floors.

When the slab is placed so that the bottom surface of the beam and the slab are at the same level, it gives an inverted T shape junction. Hence, it is called the inverted beam.

1. it is not economical – Concrete poured in two stages

2. It gives a seamless slab

This is usually provided in three cases:

1. Sunk slab for the toilet

2. Porch beams

3. Mid landing of the staircase

 

Inverted Beam uses – Why to use inverted beam?

An inverted beam concept is obtained from a flat slab concept. inverted beams refer only to the disperse of the concentrated load of the beam on the slab area.

 

Inverted beams are usually inserted into the slab at a substantial point where the slab is flat.

 

The dispersed beam is provided up to the slab above the lower level of the slab. It was given as the main beam. It provides an elegant and even ceiling surface, which is good for appearance.

 

Purpose of Inverted Beam

·       Used to disperse loads imposed on the slab.

 

·       Allows use of greater span for the slab.

 

·       Supports architectural aesthetic purposes in the interior of the building. Improve the architectural aesthetic appearance by providing a surface under the roof that is elegant and levelled.

 

The main advantage of an ‘inverted beam’ is the architecture, which does not have a visible beam drop and therefore provides a seamless slab ceiling.

 

·       It will absorb the slab sagging – It allows if brickwork needs to be constructed over the slab

 

·       Floor - ceiling height clearance.

·       A/C ductwork and electrical tray has will clear way to work and the aesthetic appearance of the building

ALSO READ: Preventive Measures and Maintenance of Buildings | LCETED | Site Engineer

 

Inverted Beam drawbacks

1. it is not economical

2. The main drawback of an inverted beam is pouring of concrete will take two-stage, (1. Slab 2. Inverted beam) which significantly affects the ability to resist stress.

What is inverted beam in construction?

 

Inverted Beam Concreting Process 

Slab Reinforcement with Inverted Beams

 

Inverted Beam Design

The inverted beam design is similar to the regular beam, but its depth is restricted and should not be too higher than slab thickness. Therefore, to overcome this barrier to a certain extent, it is necessary to increase the reinforcement ratio and the width of the beam.

ALSO READ: Guidelines for beam design | requirements for beam design | lceted

 

FAQ

What is Inverted beam?

Inverted beams is same like regular beams. When the slab is placed so that the bottom surface of the beam and the slab are at the same level, it gives an inverted T shape junction. Hence, it is called the inverted beam.

 

What is Inverted T Beam?

Inverted T - Beams are pre-stressed concrete elements with a fixed cross section. They are made using high tensile strength Prestressed wires or single wire embedded within the element. prestressed beams have many applications in floor construction.

 

What is this called? - Q/A 852

Must read: What Is Beam | Uses | Types | Loads On Beam

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