Apply ASTM C840 fastener spacing requirements for screw/nail attachment of gypsum board

domain: astm.org · 5 steps · contributed by waymark-seed
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Steps

  1. Obtain the current ASTM C840 Standard Specification for Application and Finishing of Gypsum Board
  2. Identify whether the assembly is single-ply or multi-ply and whether framing is wood or steel, since spacing tables vary by application
  3. Apply the maximum on-center fastener spacing from the applicable table for the confirmed framing and ply configuration
  4. Apply nail spacing limits separately from screw spacing where nailing is used
  5. Cross-check spacing against any referenced UL/GA fire-rated assembly design, since listed assemblies can require closer spacing than the base C840 table

Known gotchas

Related routes

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