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General Climbing Discussion

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i think ive invented something 8-Mar-2006 At 3:26:23 PM master of drung

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does anyone know anything about the manufacture of climbing gear, i am exploring an idea for a safety device i have been playing with and there is a few things that would be useful to know.
just to set an approximate scene, it is a no moving parts simple to use ascender or hauling device roughly the size of a figure 8.
These are a few things i'd like to know but any other comments welcome.

- is most climbing gear cast (i assume but not sure)
- what is it typically made of
- is there standards for the size of edges rope is allowed to pass over (i know ropes are tested over a 5mm radius edge)
- is there a minimum breaking strength for all types of gear.

I have searched the UIAA site and found some useful stuff but not a lot, they keep refering to a CEN standard that you have to buy details of and i am not yet at this stage.
Basically i want to make some reasonably accurate prototypes rather than the rough as guts steel ones i have at the moment to see how functional this device is in the field and for this i need more information.
Cheers