| # | Firmenname | Rolle | Anzahl der Projekte |
|---|---|---|---|
| 1 | ACStairmaster | Treppenlieferant | 4 |
| 2 | American Stair Corporation | Treppenlieferant | 16 |
| 3 | Euroscaff | Treppenlieferant | 1 |
| 4 | Eurostair AB | Treppenlieferant | 1 |
| 5 | F & F Steel and Stairway | Treppenlieferant | 1 |
| 6 | Hark Treppenbau GmbH | Treppenlieferant | 1 |
| 7 | Inex | Treppenlieferant | 1 |
| 8 | Jotne Ankers AS | Treppenlieferant | 2 |
| 9 | Langhof Metallbau GmbH & Co.KG | Treppenlieferant | 1 |
| 10 | Par Enterprises, Inc. | Treppenlieferant | 1 |
| 11 | PcP. Sicherheitsroste GmbH | Treppenlieferant | 0 |
| 12 | Spiral Staircase Systems | Treppenlieferant | 2 |
| 13 | Spiral Staircase Systems Inc. | Treppenlieferant | 0 |
| 14 | Stair Master Ltd. | Treppenlieferant | 0 |
| 15 | Stairways, Inc. | Treppenlieferant | 0 |
| 16 | Steel Supply & Engineering | Treppenlieferant | 1 |
| 17 | The Sharon Companies Ltd. | Treppenlieferant | 8 |
| 18 | The Sharon Stair Systems | Treppenlieferant | 8 |
| 19 | Van Dam Iron Works, Inc. | Treppenlieferant | 1 |
| 20 | Vangen Stålmontasje a/s | Treppenlieferant | 1 |
