| 1 | Tyler Christopher | CAN | 46,57 | Q | |
| 2 | Johan Wissman | SWE | 46,86 | Q | |
| 3 | Sean Wroe | AUS | 47,13 | Q | |
| 4 | Denis Alekseyev | RUS | 47,18 | ||
| 5 | California Molefe | BOT | 47,74 | ||
| 6 | David Neville | USA | 48,18 |
| 1 | Chris Brown | BAH | 46,68 | Q | |
| 2 | Nery Brenes | CRC | 46,85 | Q | |
| 3 | Maksim Dyldin | RUS | 46,92 | Q | |
| 4 | Chris Lloyd | DMA | 46,92 | ||
| 5 | Richard Buck | GBR | 47,60 | ||
| 6 | DeWayne Barrett | JAM | 48,41 |