I posed a question along these lines to Velocity last spring, specifically about the 48-spoke count Dyad rims. Here is the reply I got:
Mike,
This is all I have,
Velocity Synergy, 700c, 36 spoke count,
Drive side = 107kg-1050 Newtons- 236 Pounds
Front = 97kg- 950 Newtons- 213 Pounds
The 48 Dyad is not going to be much different from this one.
Cheers
Adam
If you need more information, I suggest
emailing Velocity (I believe they're in Australia, so give them a half a day to a day to reply).
Mike