| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 409 | Milton Campbell |  USA | 47.35 Q | 0.218 | 
| 2 | 225 | Gregory Haughton |  JAM | 47.71 Q | 0.165 | 
| 3 | 438 | Lloyd Zvasiya |  ZIM | 47.81 SB | 0.162 | 
| 4 | 154 | Adam Potter |  GBR | 47.82 | 0.173 | 
| 5 | 260 | Ka Man Chong |  MAC | 55.17 SB | 0.218 | 
| 362 | Matija Å estak |  SLO | DNS | 0.000 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 394 | Sofiane Labidi |  TUN | 46.97 Q | 0.218 | 
| 2 | 16 | Chris Brown |  BAH | 47.08 | 0.151 | 
| 3 | 107 | Salvador RodrÃguez |  ESP | 47.53 | 0.201 | 
| 325 | Ioan Lucian Vieru |  ROU | DQ | 0.219 | |
| 176 | Daryl Vassallo |  GIB | DNS | 0.000 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 422 | Joe Mendel |  USA | 47.33 Q | 0.189 | 
| 2 | 10 | Casey Vincent |  AUS | 47.42 Q | 0.181 | 
| 3 | 32 | California Molefe |  BOT | 47.58 | 0.200 | 
| 4 | 393 | Ato Stephens |  TTO | 47.62 | 0.176 | 
| 5 | 91 | Chris Lloyd |  DMA | 47.78 SB | 0.179 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 224 | Davian Clarke |  JAM | 46.36 Q | 0.235 | 
| 2 | 94 | David Canal |  ESP | 46.67 Q | 0.174 | 
| 3 | 195 | Zsolt Szeglet |  HUN | 46.92 q | 0.181 | 
| 4 | 209 | David McCarthy |  IRL | 46.94 q | 0.159 | 
| 5 | 440 | Ernie Candelario |  PHI | 48.92 SB | 0.201 | 
| 6 | 303 | Geoffrey Bai |  PNG | 50.57 SB | 0.159 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 188 | Alleyne Francique |  GRN | 46.76 Q | 0.177 | 
| 2 | 65 | Gary Kikaya |  COD | 47.09 Q | 0.159 | 
| 3 | 206 | Robert Daly |  IRL | 47.42 | 0.141 | 
| 4 | 371 | Nagmeldin Ali Abubakr |  SUD | 47.85 | 0.136 | 
| 93 | Marcelo Figueroa |  ESA | DNS | 0.000 |