| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|---|
| 1 | 1 | 5 | 112 | Chris Brown |
BAH |
45.84 Q SB |
| 2 | 2 | 5 | 156 | Pavel MASLÁK |
CZE |
46.01 Q |
| 3 | 1 | 1 | 370 | Lalonde Gordon |
TTO |
46.07 Q |
| 4 | 2 | 1 | 248 | Edino Steele |
JAM |
46.38 Q |
| 5 | 1 | 4 | 390 | Kyle Clemons |
USA |
46.42 Q |
| 6 | 3 | 1 | 178 | Marek Niit |
EST |
46.52 q |
| 7 | 1 | 3 | 165 | Luguelín SANTOS |
DOM |
46.54 Q |
| 8 | 2 | 3 | 149 | Nery Brenes |
CRC |
46.62 Q |
| 8 | 1 | 2 | 413 | David Verburg |
USA |
46.62 Q |
| 10 | 3 | 3 | 199 | Nigel Levine |
GBR |
46.64 q |
| 11 | 3 | 5 | 160 | Nick EKELUND-ARENANDER |
DEN |
46.68 |
| 12 | 4 | 3 | 125 | Anderson FREITAS HENRIQUES |
BRA |
46.82 PB |
| 13 | 2 | 2 | 314 | Rafał Omelko |
POL |
46.84 Q |
| 14 | 2 | 4 | 247 | Akheem Gauntlett |
JAM |
46.85 Q |
| 15 | 3 | 2 | 371 | Jarrin Solomon |
TTO |
46.86 |
| 16 | 3 | 4 | 240 | Tabarie Henry |
ISV |
46.87 |
| 17 | 4 | 1 | 377 | Vitaliy Butrym |
UKR |
46.98 |
| 18 | 4 | 5 | 172 | Mark UJAKPOR |
ESP |
47.16 |
| 19 | 5 | 1 | 163 | Erison Hurtault |
DMA |
47.25 |
| 20 | 4 | 2 | 164 | Gustavo Cuesta |
DOM |
47.43 |
| 21 | 4 | 4 | 287 | Bram Peters |
NED |
47.50 |
| 22 | 5 | 3 | 239 | Donald Blair-Sanford |
ISR |
47.90 |
| 23 | 5 | 2 | 211 | Nika Kartavtsevi |
GEO |
48.68 SB |
| 24 | 5 | 5 | 385 | Falcon Fagundez |
URU |
49.89 PB |
| 25 | 6 | 5 | 148 | Jannot Bacar |
COM |
50.11 |
| 4 | 191 | Richard Buck |
GBR |
DQ R163.2 | ||
| 3 | 354 | Siologa Viliamu Sepa |
SAM |
DQ R163.3(a) |