Durawood Products
Pre-Assembled Rail
- Stairs - Treads & Risers - Stair Parts

STAIR COMPONENT SPECIFICATIONS

BOX STRINGERS
  • Top edge and exposed area on inside of stringer follows grading of specified species.
  • Outside and backside of stringer follows # grading specifications unless exposed stringers" is specified.
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OPEN STRINGERS
  • Bottom edge of outside of stringers follows grading specifications of specified species.
  • Backside of stringer follows #2 grading specifications
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EXPOSED STRINGER

  • Refers to outside of box stringer
  • Material follows grading specifications of specified species.
  • Exposed stringers are sanded and may have pin holes if packaging is required
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TREADS

  • Face and bullnose of treads follows grading specifications of specified species.
  • Backside of treads follows #2 grading specifications.
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RISERS

  • Face of risers follows grading specifications of specified species
  • Backside of risers follows #2 grading specifications.
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STAIR CONSTRUCTIONS SPECIFICATIONS

  • Box stringers will be routed " deep to accept the tread and risers.
  • Glue wedges will be installed form the backside to assure a tight stringer/tread/risers joint on the face side of the stair.
  • Wedges will not protrude lower than the bottom edge of the stringer.
  • One 2" staple will be installed through the outside of each stringer into landing tread.
  • Two 2" staples will be installed through the outside of each stringer into each tread.
  • Two 2" staples will be installed through the outside of each stringer into each riser.
  • Six 2" staples will be installed through the back of each riser into the back edge of each tread.
  • Open stringers will be attached to the risers and treads with pin nail, glue and glue block.
  • A " x 13/16" dado will be cut into the bottom of each tread to accept the riser.
  • Joints will be secured with flue and glue blocks.
  • One 14" glue block per tread will be installed on stairs up to 37" wide
  • Fore each additional 6" of width one additional glue block will be installed
  • Glue blocks will be attached with flue and six 1" staples
  • All staples will be flush or counter sunk
  • A #2 yellow pine landing tread will have one 2" staple through it's face into the top riser. Flush or counters sunk not puttied and sanded.
  • A "D" yellow pine or oak landing tread will have one 2" staple through it's face into the top riser counter sunk, puttied and sanded.
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STAIR TOLERANCES
  • Stringers 1/16" on specified thickness: " on width
  • Treads 1/16" on specified thickness: 1/16" on width (depth)
  • Risers 1/16" on specified thickness: 1/16" on height
  • Stair Width 1/8" on specified on width
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