Pos | Bib | Athlete | Mark | Details | Reaction Time | |
|---|---|---|---|---|---|---|
1 | 1759 | USA | 52.05 PB | Q | 0.223 | |
2 | 1327 | GUY | 52.40 | Q | 0.206 | |
3 | 1563 | RSA | 52.65 | q | 0.177 | |
4 | 1379 | JAM | 52.70 | q | 0.201 | |
5 | 1547 | ROU | 53.28 SB | 0.235 | ||
6 | 1012 | AUS | 53.90 PB | 0.214 | ||
7 | 1531 | PUR | 54.42 NJ | 0.215 | ||
8 | 1347 | IRL | 54.52 | 0.232 |