STRUCTURAL ENGINEERING FORUM OF INDIA [SEFI]

vijayarathnam · SEFI Regulars Joined: 16 Jul 2011 Posts: 36

Dear All
Can anybody tell what is the live load to be taken for designing of slabs used for car parking. Actually it is a multilevel parking structure may be 2 or three storied.

Its urgent please.
Thanks
Vijayarathnam

naga · ... Joined: 15 Sep 2011 Posts: 52

you can check in Is-875.
generally we will take LL-10KN/m2.

Abishek_Siingh · Posted: Wed Nov 02, 2016 5:33 am Post subject:

Whatever live load you take, doesnt matter at all!

What matters is if you have designed the slab for punching and bending by taking the maximum wheel load that can come on the slab.

Use Pigeaud's Method. Refer Reynolds.

Also dont forget to take frictional load due which will come on the slab due to acceleration and braking of the vehicles.

Abhishek

rajesh a · SEFI Member Joined: 13 Sep 2010 Posts: 8

Dear Friend,

i will agree for Abhishek words,

and also if it is stack parking on structural slab you need to check that slab thickness for punching load ( {if it is supporting on 4 column }single point load= fully loaded any big vehicle/4 equal parts), ( {if it is supporting on 2 column }single point load= fully loaded big vehicle/2 equal parts),

Regards
RAJESH

es_jayakumar · Posted: Fri Nov 04, 2016 12:27 pm Post subject:

Just a logical doubt of me :
Will not the tyre of a car of medium weight burst if the load it transmits is so large as will punch the RCC slab ?

E S Jayakumar

vsmkumar · General Sponsor Joined: 03 May 2012 Posts: 49

Sir,
the punching to be checked at column, especially while stacking of cars done.
regards,
Kumar

es_jayakumar · Posted: Sat Nov 05, 2016 7:42 am Post subject:

The column of a column-beam framed structure cannot fail by punching. Punching should be checked around the wheels only...

E S Jayakumar

N. Prabhakar · General Sponsor Joined: 25 Apr 2009 Posts: 474

Dear Er. Vijayarathnam,

I had designed a multi-storey car park in UK in the early 1970s while I was in the employment of Sir Frederick Snow & Partners, Consulting Engineers, London.  It was a reinforced concrete framed structure with flat slab construction for floors.  The floors were designed for a uniform distributed imposed load of 50 lb/sqft (=2.44 kN/m^2) which was the practice then.  The car park was meant for parking of passenger cars only, and not for vans or other heavier vehicles.

As per Reynolds Handbook (8th Edn.), Table 10, based on British Code CP3, gives an uniform distributed imposed load of  2.5 kN/m^2 on floors for parking vehicles weighing not greater than 25 kN or 2.5 tons.  This load is same as those given in IS 1875 (Part 2) - 1987 for garage floors including parking area, access ways and ramps.

The Institution of Structural Engineers, London have published a book on 'Design Recommendations for multi-storey and underground car parks (4th Edition)' which would be useful for those designing the car parks and their layout.  For details, please visit their website: www.istructe.org.

With best wishes,

N. Prabhakar
Chartered Structural Engineer
Vasai (E), Pin 401 208

techno · SEFI Member Joined: 17 Jun 2011 Posts: 11

Dear All,

any reference on heavy vehicle parking garage? for example, tour bus/truck/trailer on suspended RC slab/beam.

N. Prabhakar · General Sponsor Joined: 25 Apr 2009 Posts: 474

Dear Techno,

The garage loads are given in IS 1875 (Part 2) - 1987 for the following case:

Garage floors for vehicles not
exceeding 4.0 tonnes gross
weight ( including access ways
and ramps ) -to be calculated
but not less than :
Uniformly distributed load of 5.0 kN/m^2
Concentrated load of 9 KN

Trust that the above information is useful.

N. Prabhakar
Chartered Structural Engineer
Vasai (E), Pin 401 208