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DP Rated Mortise and Tenon Door Slab Units

Design Pressure (DP) is a numerical value rating which defines the structural wind loading requirements for a building, and components or cladding of a building, described in pounds per square foot. Essentially Design Pressure represents the wind load the door system can withstand.

The following are general requirements for a Simpson Door constructed with a Mortise and Tenon in a Therma-Tru Continuous Unit to receive a DP rating:

  • Door: No screws required in door slab
  • Door: Only approved Simpson door slabs to be used (See Below)
  • Glazed (Glass) Doors can only be SDL Glazed
  • All 8/0 doors require surface bolts on active and/or passive doors
  • 6/8 Doors: Entry with Deadbolt 5-1/2” On Center Bore
  • 8/0 Doors: Entry with Deadbolt 12″ On Center Bore

Below are the unit types that are possible as well as any specific requirements that are necessary.


Opaque or Sash Single Door

Height Swing Surface Bolts Required DP Label by Reeb
6/8 Inswing/Outswing 50
8/0 Inswing/Outswing x 50

Full Lite Single Door

  • No French Doors
Height Swing Surface Bolts Required DP Label by Reeb
6/8 Inswing/Outswing 50
8/0 Inswing/Outswing x 50

Opaque or Sash Single Door; 1 Sidelite

  • Door: Jamb or Mull Hinged approved
  • 6/8 Sidelite: 12” or 14” in width, 79-1/4” in height
  • 8/0 Sidelite: 12” or 14” in width, 95-1/4” in height
  • Mullpost: Clear Reinforced Mullpost (Screws 1-1/2” above and below each strike, 4 screws total)
Height Swing Surface Bolts Required DP Label by Reeb
6/8 Inswing/Outswing 50
8/0 Inswing/Outswing x 50

Full Lite or French Single Door; 1 Sidelite

  • Door: Jamb or Mull Hinged approved
  • 6/8 Sidelite: 12” or 14” in width, 79-1/4” in height
  • 8/0 Sidelite: 12” or 14” in width, 95-1/4” in height
  • Mullpost: Clear Reinforced Mullpost (Screws 1-1/2” above and below each strike, 4 screws total)
Height Swing Surface Bolts Required DP Label by Reeb
6/8 Inswing/Outswing 50
8/0 Inswing/Outswing x 50

Opaque or Sash Single Door; 2 Sidelites

  • 6/8 Sidelite: 12” or 14” in width, 79-1/4” in height
  • 8/0 Sidelite: 12” or 14” in width, 95-1/4” in height
  • Mullpost: Clear Reinforced Mullpost (Screws 1-1/2” above and below each strike, 4 screws total)
Height Swing Surface Bolts Required DP Label by Reeb
6/8 Inswing/Outswing 50
8/0 Inswing/Outswing x 50

Full Lite or French Single Door; 2 Sidelites

  • 6/8 Sidelite: 12” or 14” in width, 79-1/4” in height
  • 8/0 Sidelite: 12” or 14” in width, 95-1/4” in height
  • Mullpost: Clear Reinforced Mullpost (Screws 1-1/2” above and below each strike, 4 screws total)
Height Swing Surface Bolts Required DP Label by Reeb
6/8 Inswing/Outswing 50
8/0 Inswing/Outswing x 50

Opaque or Sash Double Door (Active/Passive)

  • All 6/8 doors with an XX Configuration require surface bolt on Active and Passive door
  • All double doors require Coastal Astragal (special Order)
Height Swing Surface Bolts Required DP Label by Reeb
6/8 Inswing/Outswing x 50
8/0 Inswing/Outswing x 50

Full Lite or French Double Door (Active/Passive)

  • No French Doors
  • All 6/8 doors with an XX Configuration require surface bolt on Active and Passive door
  • All double doors require Coastal Astragal (special Order)
Height Swing Surface Bolts Required DP Label by Reeb
6/8 Inswing/Outswing x 50
8/0 Inswing/Outswing x 50

Opaque or Sash Double Door (Active/Stationary)

  • All 6/8 doors with an OX or XO Configuration require surface bolts on the Active door
  • Door: Jamb or Mull Hinged approved
  • All double doors require Coastal Astragal (special Order)
  • Mullpost: Clear Reinforced Mullpost (Screws 1-1/2” above and below each strike, 4 screws total)
Height Swing Surface Bolts Required DP Label by Reeb
6/8 Inswing/Outswing x 50
8/0 Inswing/Outswing x 50

Full Lite Double Door (Active/Stationary)

  • No French Doors
  • All 6/8 doors with an OX or XO Configuration require surface bolts on the Active door
  • Door: Jamb or Mull Hinged approved
  • All double doors require Coastal Astragal (special Order)
  • Mullpost: Clear Reinforced Mullpost (Screws 1-1/2” above and below each strike, 4 screws total)
Height Swing Surface Bolts Required DP Label by Reeb
6/8 Inswing/Outswing x 50
8/0 Inswing/Outswing x 50

Updated on May 15, 2021

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