How wide can I tamper?

[cve60069]

Hi
I have a 6" concrete slab that is 7.2m (23.6 foot) wide and 9.0m (29.5 foot) long that needs to be cast in one go. I am doing the laying of the concrete. The concrete will be ready-mix.

Am I being too ambitious trying to tamp a 7.2m width? I have no shortage of men and I was going to make the tamper from a ply-wood box-beam.

Thanks

 

[Ron]

That's difficult for that width, but can be done. The box beam will likely deflect (making for a slab that is not flat) and be unwieldy, even for several to handle. I would rent a vibrating screed for that size or break it into smaller sections. Even if you break into smaller sections, you can set temporary screed guides and remove those as you go.

 

[cve60069]

Ron

Thank you. I have looked up a roller screed that will do the job.

Many thanks