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Mubeen Abid

Lateral force resisting system

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As salam alaikum,

On what basis shall we select lateral force resisting system.

If I  don't have any bearing walls in my structure than how it will be bearing wall system.

Please differentiate between bearing wall and moment resisting system

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Wa alaikum assalam,

1. Lateral force resisting system (LFRS) is selected primarily based on the seismic zoning (or seismic category) of the area in which a building or structure is to constructed. LFRS selection partially depends upon the preferred material of construction (e.g., Reinforced Concrete, Structural steel, etc) as well.

2. if you don't have load bearing walls in your structure to transfer superstructure ( floor and roof ) loads to the foundation, it is NOT a 'load bearing wall system'.

3. A 'moment resisting system' is the one in which beams and columns are used to transfer the superstructure loads to the foundation. The walls provided in this type of structure are commonly termed as 'infill walls' or non-load bearing walls.

HTH

Regards.

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Thank you Engruzair.

As currently I am working in Dubai here most of the designers are using over strength value R=4.5 for RCC structures. This R value 4.5 as per UBC-97 code is for bearing wall system, this is my concern as why they are using this system as they don't have any load bearing wall in their structure.

 

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