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MSC Multiple Seat Connector

MSC

The MSC supports the ridge and two valleys for roof construction. Ideal for dormer roof applications.

Material

  • Top flange — 3 gauge; stirrups — 11 gauge (MSC2 and MSC1.81), 7 gauge (MSC4 and MSC5)

Finish

  • Simpson Strong-Tie® gray paint. HDG available; contact Simpson Strong-Tie.

Installation

  • Distribute the total load evenly about the centerline to avoid eccentric loading
  • Fasten all built-up members together as one unit
  • Net height will be calculated based on specified valley member depth and slope by the factory unless noted otherwise

Sloped and/or Skewed Valleys

  • The valley stirrups can be sloped down to 45° and skewed from 25° to 45°. (MSC5 skewed 20°-45°.)
  • The total design load of the hanger is split between the ridge (20%) and each valley (40%).
  • MSC connectors can be used for two valley connections with no ridge member. Divide the total load by two for each valley load.
  • Many combinations of joist sizes, slopes and skews can be manufactured (refer to MSC Multiple Seat Connector Special Order Worksheet, T-MSC-WS).

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.

  1. Valley loads are for each valley.
  2. Other valley-ridge load distributions are allowed provided the sum of all three carried members is distributed symmetrically about the center of the hanger and combined do not exceed the total load.
  3. MSC4 is also available in 3 1/8" glulam width.
  4. MSC5 is also available in widths up to 5 1/2". W2 minimum width is 3 1/8".
  5. MSC4 is also available in widths down to 1 9/16". Use 10d x 1 1/2" nails and MSC2 allowable loads.
  6. Refer to technical bulletin T-MSC-WS for the hip valley rafter pitch conversion table.
  7. NAILS: 16d = 0.162" dia. x 3 1/2" long, 10d = 0.148" dia. x 3" long, 10d x 1 1/2" = 0.148" dia. x 1 1/2" long.
    See other nail sizes and information.

Code Reports

Part IAPMO UES ER ICC-ES ESR City of Los Angeles State of Florida
MSCSee specific model numbers for code listings.
MSC1.81 RR25803
MSC2 RR25803
MSC4 RR25803
MSC5 RR25803

Drawings

Part Orthographic Perspective
MSCNone None
MSC1.81None None
MSC2None None
MSC4
MSC4
DWGDXF
MSC4 front view
DWG DXF
MSC4 left view
DWG DXF
MSC4 right view
DWG DXF
MSC4 top view
DWG DXF
None
MSC5None None