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.

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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′

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New Castle Steel Deck Framing

Durable

Safe

Sustainable

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