Our forums are intended to allow both structural engineers and non-structural engineers to discuss the matters which affect them, obtain help with any queries and act as a useful way in which to communicate.

For more information, please visit the I need help or frequently asked questions areas.

General Public forum for all website users to post comments or queries
Institution Forums > General > Ribdeck 80 for ground floor slab? View modes: 
User avatar
Site User
Site User - 21/01/2019 16:08:14
Ribdeck 80 for ground floor slab?
My SE has suggested a Pile + Ground Beam foundation. To support the slab however he has suggested a Ribdeck 80 metal decking.

The Ribdeck 80 providers are confused with this as most of them have not seen Ribdeck 80 suggested for ground floor slab as it is prone to weathering and the elements + heave from soil which has high plasticity index of 55.

Is Ribdeck 80 a sensible option for a ground floor slab base which will be open to the air, weather and soil below it? Is this common?


User avatar
Member (MIStructE)
Member (MIStructE)
David Ormshaw - 03/03/2019 14:09:39
RE:Ribdeck 80 for ground floor slab?
Since you mentioned high plasticity I suspect your SE is proposing that the ground floor is a suspended constuction with a void below. This suspended floor constuction is commonly built using beam and block.
Hasn't you SE provided draings showing his design proposal?

PLEASE NOTE: Users seeking advice on home improvements or adaptations should consult a structural engineer using our Building Confidence service, where you can locate a trustworthy professional near you and get the advice you need to ensure your works are safe and secure. No advice provided within the forum can be guaranteed by the Institution, neither can it be a substitute for a consultation on site.

It is important that before using any of the Institution forums, that you have read and understood our complete terms and conditions of use.

All of the pages on this website are the copyright © of The Institution of Structural Engineers.

The Institution of Structural Engineers, International HQ, 47-58 Bastwick Street, London, EC1V 3PS, United Kingdom
Tel: +44 (0)20 7235 4535 Fax: +44 (0)20 7235 4294
Registered with the Charity Commission for England and Wales No. 233392 and in Scotland No. SC038263
Follow us on: Twitter Facebook LinkedIn Youtube The Structural Engineer Jobs