Spacing of Wood I Joists
Spacing of Wood I Joists
(OP)
We are considering spacing Wood I Joists at 24" centers for material efficiency and LEEDs points, and will obviously select so that the numbers work. But does anyone have war stories or cautionary tales about their use at this wide spacing? We will glue/nail, and select a 7/8" span-rated subfloor. Other considerations? Thank you in advance!






RE: Spacing of Wood I Joists
BA
RE: Spacing of Wood I Joists
Whether 7/8" subfloor is adequate is a matter for debate, depending upon what the floor loads and finish will be. Keep in mind that ASCE 7 requires strength for point loads, not just distributed loads. Sound transmission, deflection, and vibration all can be real issues with longer spans, wider spacing, and shallower framing.
Once you establish that they can take the loads and you can have adequate openings for utilities and services, and that the serviceability requirements can be met, you probably have an adequate design.
RE: Spacing of Wood I Joists
I know what is common; we have specified wood I joists at 16" centers for a decade or two. Rather I am seeking commentary from someone who has spaced I joists at 24" and has experience to share. I have not selected a material because of LEED, I have chosen the spacing. I can read references and apply normal engineering practices but would love to hear war stories from those who have used this material as I'm describing. In my experience changing a detail of material use often introduces practical issues I haven't thought of. Thanks.
RE: Spacing of Wood I Joists
RE: Spacing of Wood I Joists
LEED dictates joist spacing?
RE: Spacing of Wood I Joists
BA
RE: Spacing of Wood I Joists
EIT
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