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SCBH™ Concealed Beam Hanger

The SCBH concealed beam hanger matches the beam-to-column download capacity of the ACBH™ while increasing the ability to deform when subjected to joint rotation due to seismic forces and inter-story drift. This combination makes the SCBH ideal for use at glulam beam-to-column connections in high-seismic regions. This hanger installs easily in the factory using our fully threaded Strong-Drive® SDCF Timber-CF structural screws and offers generous onsite fit-up tolerance for smooth and easy beam installation.

A second backplate option is available for specifiers connecting glulam beams to steel supporting structures (e.g., steel columns, steel embed plates in concrete walls). The SCBH-W backplate is welded to the steel support and mated with a standard SCBH backplate that is attached to the end grain of a glulam beam.

Key Features

  • High download capacity
  • Code-listed per ICC-ES ESR-2552
  • Seismic deformation compatibility — Recommended for use at beam-to-beam and beam-to-column connections in any Seismic Design Category (see L-C-SCBHDRIFT)
  • Concealed for architectural aesthetics and fire-rated performance
  • One- and two-hour fire resistance ratings per ASTM E119 for wood-to-wood connection
  • +/- 1/16" beam length tolerance on each end enables easier installation

Applications

  • SCBH is recommended for dry-service applications only

Material

  • Steel

Finish

  • SCBH backplate: Electrogalvanized; SCBH-W backplate: Gray paint

Installation

  • Use all specified fasteners; install horizontal screws first, then inclined screws. Centerline notch at the top of the part can be used to help locate the connector on the wood member.
  • Do not overdrive SDCF screws during installation of fasteners. Predrilling lead holes for the SDCF screws is recommended if wood members tend to split or if driving the SDCF fasteners at the proper angle is difficult due to wood grain resistance. Predrilled holes for the SDCF screws shall be 3/16" diameter maximum.
  • Rout carried and/or carrying member according to application needs. The minimum recommended rout width and length is 1/16" larger than the tabulated part dimensions. The recommended corner radius is 3/8" (10 mm). The backplates must seat flush against the surfaces to which they are being fastened.
  • A 1/8" minimum to 1/4" maximum gap is recommended between the carried and carrying members to prevent wood-wood binding during field assembly. Fire sealant is required at the SCBH connection location when considering fire resistance (See C-C-MASSTIMBER for intumescent details). Gaps larger than 1/4" may further improve ease of installation but must be approved by the Engineer of Record when considering fire resistance.
  • When attaching to the end grain of glulam members with multiple piece laminations across the width, refer to L-C-CBHSPLATLAM for more information.
  • Welding of SCBH-W backplate to steel supports shall be performed by qualified welders. Instructions for the weld size, location and length are engraved on the face of the SCBH-W backplate.

Options

  • Double connectors can be used on a single carried beam end for increased connection capacity (see load tables).
  • SCBH-W backplate option for wood beam to steel support connections.

Related Literature

Connectors, Fasteners & Anchors for Mass Timber Construction
C-C-MASSTIMBER24
A catalog featuring connectors, fasteners and anchors for mass timber and CLT construction solutions.
Catalog
SCBH™ Steel Concealed Beam Hanger
F-MT-SCBH23
A flier providing product and installation information for the SCBH steel concealed beam hanger.
Flier
ACBH™, SCBH™, and CBH Hangers installed in Split lam Glulam
L-C-CBHSPLTLAM24
Simpson Strong-Tie® has evaluated the ACBH, SCBH, and CBH when installed in end-grain, on carried beams assembled with multiple-piece laminations.
Engineering Letter
LRFD load values for CBH, ACBH™, SCBH™, and HSKP™
L-C-CBHLRFD24
Simpson Strong-Tie has reviewed test and calculation data to determine LRFD load values derived from existing ASD load values per guidance from 2018 NDS Appendix N.
Engineering Letter
Simpson Strong-Tie® CBH Concealed Beam Hanger Installed on Weyerhaeuser Parallam® PSL
L-C-ENDGRNPSL24
Simpson Strong-Tie has evaluated the CBH, ACBH™, and SCBH™ concealed beam hanger series of connectors installed into end grain on Parallam® Parallel Strand Lumber (PSL) carried beams.
Engineering Letter
Simpson Strong-Tie® Concealed Beam Hangers Installed on Freres Mass Ply Lam (MPL)
L-C-CBHFMPL24
Simpson Strong-Tie has evaluated the CBH, ACBH™, and SCBH™ concealed beam hanger series of connectors installed into end grain on Freres Mass Ply Lam (MPL)
Engineering Letter
SCBH — Assessment of Fire Resistance Rating
SCBH Summary Technical Note (Issue)
Simpson Strong-Tie has introduced a new mass timber beam hanger, SCBH, to connect a glulam beam to a glulam column. The SCBH is nearly identical in its resistance with the previously fire-tested ACBH.
Engineering Letter
Simpson Strong-Tie® SCBH Steel Concealed Beam Hanger — Seismic Deformation Compatibility Testing
L-C-SCBHDRIFT23
Simpson Strong-Tie has evaluated the SCBH steel concealed beam hanger for seismic deformation compatibility.
Engineering Letter

Product Information Table

Fastener Production Information and Stuff & Things
New products
Model No. W (in.) H (in.) Product Includes Material Coating Packaging Qty.
SCBH3X15.37-KT 3 15 3/8 (2) SCBH 3x15.37 backplates, (24) SDCF22614 screws and (24) SDCF22434 screws Steel Electrogalvanized 1
SCBH3X15.37W-KT 3 15 3/8 (1) SCBH 3x15.37 backplate, (1) SCBH 3x15.37W backplate and (24) SDCF22614 screws Steel Electrogalvanized / Simpson Strong-Tie Gray Paint 1

Load Tables

SCBH Allowable Downloads — Wood-to-Wood

Model Configuration Assembly Dimensions. (in.) Fasteners Allowable Download (lb.)
DF/SP SPF/HF
W H Carried Beam Carrying Column/Beam Floor (100) Snow (115) Roof (125) Floor (100) Snow (115) Roof (125)
SCBH3X15.37 Single 3 15 3/8 (24) SDCF22614 Column (24) SDCF22434 19,820 21,935 21,935 13,680 15,735 17,105
Beam 14,820 17,040 18,525 13,305 15,200 16,630
Double 6 1/2 15 3/8 (48) SDCF22614 Column (48) SDCF22434 39,640 43,870 43,870 27,360 31,470 34,210
Beam 29,640 34,080 37,050 26,610 30,400 33,260
  1. Table loads are for minimum beam width of 5 5/8" (eside ≥ 1 5/16"). For beam widths between 5 1/8" and 5 5/8" (1 1/16" ≤ eside < 1 5/16"), multiply allowable load by 0.93.
  2. When considering uplift forces, use Simpson Strong-Tie Strong-Drive SDWC™15600 (6" length) screw per detail (see below). Uplift capacity is 555 lb. for DF/SP and 485 lb. for SPF/HF per screw. Use multiple screws for additional uplift.
  3. Fasteners: SDCF22434 and SDCF22614 = 0.315" OD by 4 3/4" long and 6 1/4" long Strong-Drive SDCF TIMBER-CF screw, respectively.

Connection Geometry Requirements — Wood-to-Wood

Model Configuration Minimum Carried Beam Sizes (in.) Assembly Dimensions (in.) Minimum Edge Distance (in.)
Considering Only Fastener Edge Distance One-Hour Fire Resistance Two-Hour Fire Resistance Considering Only Fastener Edge Distance One-Hour Fire Resistance Two-Hour Fire Resistance etop
Ws Ds Ws Ds Ws Ds W Gapmin H eside ebottom eside ebottom eside ebottom
SCBH3X15.37 Single 5 1/8 18 6 3/4 19 10 1/4 20 3/4 3 — 15 3/8 1 1/16 7/8 1 7/8 1 7/8 3 5/8 3 5/8 1 3/4
Double 8 5/8 18 10 1/4 19 1/2 12 1/4 21 6 1/2 1/2 15 3/8 1 1/16 7/8 1 7/8 2 3/8 2 7/8 3 7/8 1 3/4
  1. Side edge distances for carrying vertical columns must meet or exceed the eside table values for the carried beam.
  2. For 1 1/16" ≤ eside < 1 5/16", see footnotes of the Allowable Download table for allowable load reduction.
  3. Minimum carried beam sizes and edge distances for one-hour and two-hour fire resistance are based on ASTM E119 fire testing. Test specimens included 3M Expantrol E-FIS intumescent fire seal at the beam-to-column interface. Substitutions for the 3M Expantrol are allowable provided they meet or exceed the 3M Expantrol's specifications for flame spread, smoke developed index, intumescent activation temperatures (expansion rate) and service temperatures.
  4. Top edge distances in the table assume full coverage of the top of carried beam. A full coverage condition occurs when the top of the beam is not directly exposed to fire (i.e., roof or floor members attached to the top of the supported beam and providing complete continuous cover to the top of the carried beam). For conditions where the top of the carried beam is exposed to fire, increase the minimum top edge distance to eside for the installed condition.
  5. For one-hour and two-hour fire resistance, the gap between the end of the carried member and the face of the carrying member shall not exceed 1/4".

SCBH-W Allowable Downloads — Wood-to-Steel

Model Configuration Assembly Dimensions (in.) Fasteners Allowable Download (lb.)
W H Carried Beam Carrying Column/Beam DF/SP SPF/HF
Floor (100) Snow (115) Roof (125) Floor (100) Snow (115) Roof (125)
SCBH3X15.37W Single 3 15 3/8 (24) SDCF22614 See welded installation figure for weld size/location/length 20,050 20,575 20,575 14,135 16,255 17,670
Double 7 15 3/8 (48) SDCF22614 40,100 41,150 41,150 28,270 32,510 35,340
  1. Table loads are for minimum beam width of 5 5/8" (eside ≥ 1 5/16"). For beam widths between 5 1/8" and 5 5/8" (1 1/16" ≤ eside < 1 5/16"), multiply allowable load by 0.93.
  2. Fasteners: SDCF22614 = 0.315" OD by 6 1/4" long Strong-Drive® SDCF TIMBER-CF screw.
  3. Loads assume E-70XX weld material.
  4. Welds must conform to the current AWS D1.1 structural welding code for steel. Follow proper welding procedures and safety precautions.
  5. Minimum steel thickness of supporting steel member to be evaluated by the designer.
  6. Connection not evaluated for uplift.
  7. The SCBH-W backplate is engraved with instructions for the required weld size, location, and length. Portions of the part edges that are engraved with the text "Do not weld" shall not be welded.

Connection Geometry Requirements — Wood-to-Steel

Model Configuration Minimum Carried Beam Sizes (in.) Assembly Dimensions (in.) Minimum Edge Distance (in.) etop
Ws Ds W Gap H eside ebottom
SCBH3X15.37W Single 5 1/8 18 3 — 15 3/8 1 1/16 7/8 1 3/4
Double 9 1/8 18 7 1 15 3/8 1 1/16 7/8 1 3/4
  1. Minimum carried beam sizes and minimum edge distances consider only fastener edge distance in the carried beam. SCBH3X15.37W was not evaluated for fire resistance.
  2. For 1 1/16" ≤ eside < 1 5/16", see footnotes of the Allowable Download table for allowable load reduction.
  3. Assembly dimension for double configuration is measured from outside edge of part to outside edge of adjacent part.

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT

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