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LSC Adjustable Stringer Connector


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The LSC adjustable stair-stringer connector offers a versatile, concealed connection between the stair stringer and the carrying header or rim joist while replacing costly framing. Field slopeable to all common stair stringer pitches, the LSC connector is suitable for either solid or notched stringers.

Key Features

  • Replaces additional framing and toe-nailing.
  • Suitable for most installations on 2x10 or 2x12 header/rim board.
  • May be installed flush with the top of the carrying member or lower on the face.
  • Interchangeable for left or right applications.
  • LSCZ features a ZMAX® coating for additional corrosion protection. Suitable for interior and some exterior applications. LSCSS is made from stainless steel for higher exposure environment. See Corrosion Information.


  • 18 gauge


  • LSCZ — ZMAX® coating; LSCSS — stainless steel


  • Use all specified fasteners; see table.
  • Before fastening, position the stair stringer with the LSC on the carrying member to verify where the bend should be located.
  • Tabs on the LSC must be positioned to the inside of the stairs.
  • The fastener that is installed into the bottom edge of the stringer must go into the second-to-last hole.
  • When installed on 1 5/16" LVL or a 1 1/4" LSL stringer, additional items that will not affect the structural performance of the LSC, but should be considered, include the following:
    — LSC stringer flange will protrude 1/4" from face of stringer. As such, it is recommended the LSC be installed with the tabs positioned to the outside of the stringer.
    — 1 1/2" fasteners installed into 1 1/4" LSL stringer will protrude from the opposite side.

Related Literature

Load Tables

    These products are available with additional corrosion protection. Additional products on this page may also be available with this option, check with Simpson Strong-Tie for details.

   These models are approved for installation with the Strong-Drive® SD Connector screw. See the load values below.

  1. Stair stringer must be minimum 1 5/16" LVL or minimum 1 1/4" LSL. Allowable loads for DF/SP species material shall apply.
  2. When cross-grain tension forces cannot be avoided in the members, mechanical reinforcement to resist such forces shall be considered.
  3. Simpson Strong-Tie #9 x 1 1/2" Strong-Drive SD Connector screws may be substituted for 10d x 1 1/2" nails to achieve published nail values if the extra screw is installed in the narrow face of stringer.
  4. NAILS: 10d x 1 1/2" = 0.148" dia. x 1 1/2" long. Nails shall be hot-dip galvanized for LSCZ and stainless steel for LSCSS.
    See other nail sizes and information.
  5. SCREWS (LSCZ only): SD #9 x 1 1/2" (model SD9112) = 0.131" dia. x 1 1/2" long.
    See SD screws.

Code Reports

Part IAPMO UES ER ICC-ES ESR City of Los Angeles State of Florida
LSC No code listing. Please contact us for test data.
LSCSS No code listing. Please contact us for test data.
LSCZ ER-102 ER-280 RR25962 FL10865


Part Orthographic Perspective
LSCNone None
Installation Details Connectors and Fasteners Construction of Wood Decks Detail Sheet
LSCZ Front View
LSCZ Left View
LSCZ Top View