AFP HALO geometry/dimensions specs, and HALO for small tubular chassis single seaters race cars

[charlyfierros]

Hi!
Does anybody knows what are the AFP HALO geometry/dimensions specs are?
The FIA standard 8869 only talks about the structural loads to be supported and it says nothing about the geometric dimensions. For example it says nothing about the height, ring width etc.
Only says
" 4.1 Geometry
The manufacturer must produce the AFP in compliance with the dimensions and tolerances defined in the Supplementary Technical Information"
And it's impossible to found that supplementary technical information if it
does exists.
And on the other side. Does anybody know if does exists AFP HALO specs for small tubular chassis single seaters like Formula Ford, some Formula Renault's, some formula 4's? Because I think the requirements shouldn't be the same, because the speeds, mass, budgets are not the same as a F1 car.
Does anybody knows?
Thanks!
Best wishes!

[jjn9128]

https://www.fia.com/sites/default/files ... 22_v00.pdf

page 54-58 of the Formula E documents have some detailed drawings of the halo. Alternatively contact one of the approved manufacturers.