Centralizers on Augercast Piles 1

[abusementpark]

Does anyone have some advice on setting guidelines for how many centralizers (footballs - as the foreman call them) should be placed on the reinforcement of an augercast concrete pile?

 

[born2drill]

One centralizer every 10 feet.

 

[lexim]

I worked on a project last fall into winter and these were used at spacings of 6000mm in cased auger piles.

Regards

 

[abusementpark]

Has any authoritative agency commented on this matter?

 

[born2drill]

FHWA Geotechnical Engineering Circular #8 says:
"Centralizers are used at spacing of no more than 3m (10ft)"