New Castle Steel Deck Framing
When it comes to choosing a substructure for your deck, it’s important to prioritize durability and longevity. Steel is the strongest framing material available, and New Castle Steel is among the best.
Durable
- Triple-coated steel offers consistency, durability, and reliability that other materials cannot.
- Precise engineering ensures surfaces remain flat.
- Unmatched strength allows for longer spans.
- Invulnerability to fire, rot, and insects.
Safe
- Explicitly designed for the outdoors and code-listed for exterior use, supported by the CCRR-0186 code compliance research report.
- Engineered with every detail in mind, held to industry-leading standards, and protected by our 25-Year Limited Residential Warranty to prove it.
Sustainable
- Contains 25% recycled American-made steel and is 100% recyclable, contributing to LEED points for building projects.
- Chemical-free, kinder to the earth than pressure-treated lumber.
Technical Info
New Castle Steel Product Brochure
New Castle Steel Installation Guide
New Castle Steel Joist Span Charts
MAXIMUM JOIST SPAN—50 PSF TOTAL LOAD
| JOIST TYPE | JOIST THICKNESS | JOIST SPACING ON CENTER | |
| 12″ | 16″ | ||
| MAXIMUM DECK JOIST SPAN LENGTH (feet) | |||
| New Castle Steel | 1 5/8″ | 15′ | 13′ |
| 1 5/8″ Every Other Doubled |
17′ | 15′ | |
| 1 5/8″ All Doubled |
18′ | 17′ | |
| 2″ | 18′ | 16′ | |
| 2″ Every Other Doubled |
20′ | 18′ | |
| 2″ All Doubled |
22′ | 20′ | |
MAXIMUM JOIST SPAN—75 PSF TOTAL LOAD
| JOIST TYPE | JOIST THICKNESS | JOIST SPACING ON CENTER | |
| 12″ | 16″ | ||
| MAXIMUM DECK JOIST SPAN LENGTH (feet) | |||
| New Castle Steel | 1 5/8″ | 14′ | 12′ |
| 1 5/8″ Every Other Doubled |
16′ | 14′ | |
| 1 5/8″ All Doubled |
18′ | 16′ | |
| 2″ | 18′ | 16′ | |
| 2″ Every Other Doubled |
20′ | 18′ | |
| 2″ All Doubled |
22′ | 20′ | |
MAXIMUM JOIST SPAN—100 PSF TOTAL LOAD
| JOIST TYPE | JOIST THICKNESS | JOIST SPACING ON CENTER | |
| 12″ | 16″ | ||
| MAXIMUM DECK JOIST SPAN LENGTH (feet) | |||
| New Castle Steel | 1 5/8″ | 12′ | 11′ |
| 1 5/8″ Every Other Doubled |
14′ | 12′ | |
| 1 5/8″ All Doubled |
16′ | 14′ | |
| 2″ | 16′ | 15′ | |
| 2″ Every Other Doubled |
19′ | 17′ | |
| 2″ All Doubled |
21′ | 19′ | |
MAXIMUM JOIST SPAN—125 PSF TOTAL LOAD
| JOIST TYPE | JOIST THICKNESS | JOIST SPACING ON CENTER | |
| 12″ | 16″ | ||
| MAXIMUM DECK JOIST SPAN LENGTH (feet) | |||
| New Castle Steel | 1 5/8″ | 10′ | 9′ |
| 1 5/8″ Every Other Doubled |
12′ | 10′ | |
| 1 5/8″ All Doubled |
14′ | 12′ | |
| 2″ | 15′ | 14′ | |
| 2″ Every Other Doubled |
17′ | 16′ | |
| 2″ All Doubled |
19′ | 17′ | |
MAXIMUM JOIST SPAN—150 PSF TOTAL LOAD
| JOIST TYPE | JOIST THICKNESS | JOIST SPACING ON CENTER | |
| 12″ | 16″ | ||
| MAXIMUM DECK JOIST SPAN LENGTH (feet) | |||
| New Castle Steel | 1 5/8″ | 9′ | 8′ |
| 1 5/8″ Every Other Doubled |
10′ | 9′ | |
| 1 5/8″ All Doubled |
12′ | 10′ | |
| 2″ | 14′ | 13′ | |
| 2″ Every Other Doubled |
16′ | 14′ | |
| 2″ All Doubled |
18′ | 16′ | |
MAXIMUM JOIST SPAN—200 PSF TOTAL LOAD
| JOIST TYPE | JOIST THICKNESS | JOIST SPACING ON CENTER | |
| 12″ | 16″ | ||
| MAXIMUM DECK JOIST SPAN LENGTH (feet) | |||
| New Castle Steel | 1 5/8″ | 8′ | 7′ |
| 1 5/8″ Every Other Doubled |
9′ | 7′ | |
| 1 5/8″ All Doubled |
10′ | 8′ | |
| 2″ | 13′ | 11′ | |
| 2″ Every Other Doubled |
15′ | 13′ | |
| 2″ All Doubled |
16′ | 15′ | |
