Mytikas Steel

Floor joist span finder.

Describe the floor and the span. We list the Mytikas Steel 2" flange joists that make it, lightest first.

What's the floor for?

Typical minimum live loads from IBC Table 1607.1. Your local code and the engineer of record govern.

What's on the floor?

Dead load is the weight of the floor itself. These are typical values; add up your assembly if it differs.

Span
ft
in

Clear span between supports.

Joist spacing
Supports
Floor stiffness

Job details optional
sq ft

Shown on the spec sheet and sent with a quote request. Floor area gives a rough joist quantity.

Mytikas Steel

Request a quote.

Send us your selection and our team will price the joists, delivered from our factory in Florence, Colorado.

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Before you spec.

  • Spans are for uniform floor loads. Concentrated loads, openings, cantilevers and continuous spans other than two equal spans need an engineer.
  • The top (compression) flange is braced along its full length by sheathing fastened to it. Joists are braced against rotation at every support, and flanges are fastened to the support.
  • Every support assumes 3-1/2" of bearing. Shorter bearing changes the web stiffener requirement and may reduce capacity.
  • Two equal spans: enter each span, measured from an end support to the center support. The joist runs continuous over the center support.
  • Total-load deflection is limited to L/240 in every table, with live-load deflection at L/360 or L/480 as selected.
  • With sheathing on the top flange only, install bridging on the bottom flange at no more than 8 ft on center.
  • Web punchouts near a support may need reinforcement.

Where the numbers come from.

Allowable spans are from the ClarkDietrich “Cold-Formed Structural Framing Products Technical Design Guide” (Pub. No. CD-STR-TechGuide, effective 06/01/24), floor joist tables pp. 63 to 88, designed to AISI S100-16 (2020) w/S2-20. It is the industry reference our engineers use. Joist weights are from the same guide, pp. 13 to 17.

Mytikas Steel joists are roll-formed from 50 ksi steel in Florence, Colorado, and meet or exceed the ClarkDietrich sections these tables are based on: 2" flange, 5/8" lip, 54, 68 and 97 mil.

This tool is for preliminary sizing and pricing. The engineer of record is responsible for the final design.