CBH Concealed Beam Hanger
Product Details
Computer modeling and CNC manufacturing enables glulam to be delivered to the jobsite in precise lengths and with preinstalled concealed hangers. The CBH concealed beam hanger is specifically designed for such applications, and is installed with readily available Simpson Strong-Tie® SDS Heavy-Duty Connector screws. The CBH has been tested for inter-story drift and has achieved 1-hr and 2-hr fire resistance ratings according to ASTM E119.
Key Features
- Code-listed per ICC-ESR-2552.
- Concealed for architectural aesthetics and fire-rated performance.
- Multiple router options to suit jobsite needs.
- +/- 1/32" beam length tolerance on each end enables easier installation.
- 1-hr and 2-hr fire resistance ratings per ASTM E119.
- Seismic deformation compatibility -- Recommended for use at beam-to-beam connections in any Seismic Design Category. At beam-to-column connections, see L-C-CBHDRIFT for more information.
Material
- 3 ga.
Finish
- Electro-galvanized. May be ordered as HDG.
Installation
- 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 CBH connection location when considering fire resistance. See C-C-MASSTIMBER for intumescent details.
- Do not overdrive SDS screws during fastener installation.
- Predrilling lead holes for the SDS screws is recommended if wood members tend to split or if driving the SDS fasteners properly at 90 degrees to the face of the wood member is difficult due to wood grain resistance. Lead holes for the SDS screws shall be 5/32" diameter.
- 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 1/4". The back plates must seat flush against the surfaces to which they are being fastened. For installation clearance, an additional 1/8" deep rout allowing for the CBH stud head is recommended in the supporting beam/column face (see figures).
- Install CBH plates on carried and carrying members using all specified SDS fasteners.
- Mate carried member to carrying member according to installation illustrations.
- Note that the tolerances for glulam finished dimensions provided within CSA 0122 for Canada, and ANSI 117 for the United States, may not provide adequate squareness and depth consistency required to ensure problem-free field installation. To achieve a problem free installation, glulam producers are advising that both beam and column members should be designed with a 1/4" (6mm) undersize in depth and 1/8" (3 mm) in width (eg: 5 1/8" x 12" beam becomes 5" x 11 3/4"), so that more aggressive planing can be used to achieve the desired squareness and depth tolerances needed for this hanger. In addition, it is suggested to avoid cambered beams with this hanger, and instead design deeper or wider beams to control deflection.
- When attaching to the end grain of glulam members with multiple piece laminations across the width, refer to L-C-CBHSPLATLAM for more information.
Options
- Connection has been load-rated for two different screw lengths in the carrying member
- Joist can be connected to carrying members made of wood, steel, concrete, or grout-filled CMU
- Double connectors can be used on a single carried beam end for increased connection capacity (see load table footnotes)
Related Literature
Product Information Table
| Model No. | Ga. | W (in.) | H (in.) | Coating/Material | Applications | Product Includes | Packaging Qty. |
|---|---|---|---|---|---|---|---|
|
Footnotes
|
|||||||
| CBH2.37X5.5B-KT | 3 | 2 3/8 | 5 1/2 | Electrogalvanized | Joist to beam | (2) backplates, (13) SDS25300 screws and (13) SDS25600 screws | 1 |
| CBH2.37X5.5C-KT | 3 | 2 3/8 | 5 1/2 | Electrogalvanized | Joist to column | (2) backplates and (26) SDS25600 screws | 1 |
| CBH2.37X5.5H-KT | 3 | 2 3/8 | 5 1/2 | Hot-Dip Galvanized | Joist to beam or joist to column | (2) backplates (screws not included) | 1 |
| CBH2.37X5.5-R10 | 3 | 2 3/8 | 5 1/2 | Electrogalvanized | Joist to beam or joist to column | (20) backplates (screws not included) | 10 |
| CBH2.37X7.63B-KT | 3 | 2 3/8 | 7 5/8 | Electrogalvanized | Joist to beam | (2) backplates, (18) SDS25300 screws and (18) SDS25600 screws | 1 |
| CBH2.37X7.63C-KT | 3 | 2 3/8 | 7 5/8 | Electrogalvanized | Joist to column | (2) backplates and (36) SDS25600 screws | 1 |
| CBH2.37X7.63H-KT | 3 | 2 3/8 | 7 5/8 | Hot-Dip Galvanized | Joist to beam or joist to column | (2) backplates (screws not included) | 1 |
| CBH2.37X7.63-R10 | 3 | 2 3/8 | 7 5/8 | Electrogalvanized | Joist to beam or joist to column | (20) backplates (screws not included) | 10 |
| CBH2.37X9.75B-KT | 3 | 2 3/8 | 9 3/4 | Electrogalvanized | Joist to beam | (2) backplates, (23) SDS25300 screws and (23) SDS25600 screws | 1 |
| CBH2.37X9.75C-KT | 3 | 2 3/8 | 9 3/4 | Electrogalvanized | Joist to column | (2) backplates and (46) SDS25600 screws | 1 |
| CBH2.37X9.75H-KT | 3 | 2 3/8 | 9 3/4 | Hot-Dip Galvanized | Joist to beam or joist to column | (2) backplates (screws not included) | 1 |
| CBH2.37X9.75-R10 | 3 | 2 3/8 | 9 3/4 | Electrogalvanized | Joist to beam or joist to column | (20) backplates (screws not included) | 10 |
Load Tables
Table 1: Allowable Downloads
| Model No. | Dimensions (in.) | Fasteners | Allowable Downloads (lb.) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| DF/SP | SPF/HF | ||||||||
| W | H | Carried Beam | Carrying Column/Beam | Floor (100) | Roof/Snow (125/ 115) | Floor (100) | Roof/Snow (125/ 115) | ||
| CBH2.37x5.5B | 2 3/8 | 5 1/2 | (13) SDS 1/4" x 6" | Beam | (13) SDS 1/4" x 3" | 5,045 | 5,045 | 3,900 | 4,320 |
| CBH2.37x5.5C | Column | (13) SDS 1/4" x 6" | 5,460 | 5,700 | 3,900 | 4,485 | |||
| CBH2.37x7.63B | 2 3/8 | 7 5/8 | (18) SDS 1/4" x 6" | Beam | (18) SDS 1/4" x 3" | 6,790 | 6,790 | 5,400 | 5,815 |
| CBH2.37x7.63C | Column | (18) SDS 1/4" x 6" | 6,925 | 6,925 | 5,400 | 5,930 | |||
| CBH2.37x9.75B | 2 3/8 | 9 3/4 | (23) SDS 1/4" x 6" | Beam | (23) SDS 1/4" x 3" | 9,175 | 9,175 | 6,900 | 7,855 |
| CBH2.37x9.75C | Column | (23) SDS 1/4" x 6" | 9,335 | 9,335 | 6,900 | 7,935 | |||
- Table loads for CBH require a 5 1/2" minimum carried beam width. For 5 1/8" ≤ carried beam width < 5 1/2", multiply allowable load by 0.81. For 3 1/2" ≤ carried beam widths < 5 1/8", refer to L-C-CBH4XSKEW.
- For installation of Simpson Strong-Tie Strong-Drive SDWC15600 screws into the top of the beam for uplift: Install screw at a 45° angle 2" from the end of the beam. Minimum spacing requirements for SDWC15600 screws are 1/2" edge distance and 1" screw spacing when using multiple screws. Uplift capacity is 555 lbf for DF/SP and 485 lbf for SPF/HF per screw. Use multiple screws for additional uplift.
- For skewed installations of the CBH, refer to L-C-CBH4XSKEW.
- CBH may be installed on supporting vertical columns using SDS 1/4" x 3" screws with reduced download capacities. Beam-beam allowable download capacities apply.
- Allowable load for double connections are equivalent to the allowable load of one connection multiplied by 2.
Table 2: Minimum Carried Beam Sizes and Edge Distances
| Model No. | Qty. | Configuration | Minimum Carried Beam Sizes (in) | Assembly Dimensions | Minimum Edge Distances (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 | H | eside | ebottom | eside | ebottom | eside | ebottom | ||||
| CBH2.37x5.5 | 1 | Single | 5 1/2 | 7 9/16 | 6 3/4 | 8 7/8 | 9 3/4 | 10 3/8 | 2 3/8 | 5 1/2 | 1 9/16 | 7/8 | 2 3/16 | 2 3/16 | 3 11/16 | 3 11/16 | 1 3/16 |
| CBH2.37x7.63 | 5 1/2 | 9 11/16 | 6 3/4 | 11 | 9 3/4 | 12 1/2 | 2 3/8 | 7 5/8 | 1 9/16 | 7/8 | 2 3/16 | 2 3/16 | 3 11/16 | 3 11/16 | 1 3/16 | ||
| CBH2.37x9.75 | 5 1/2 | 11 13/16 | 6 3/4 | 13 1/8 | 9 3/4 | 14 5/8 | 2 3/8 | 9 3/4 | 1 9/16 | 7/8 | 2 3/16 | 2 3/16 | 3 11/16 | 3 11/16 | 1 3/16 | ||
| CBH2.37x5.5 | 2 | Double | 8 1/4 | 7 9/16 | 8 3/4 | 8 1/2 | 11 1/2 | 9 7/8 | 5 1/8 | 5 1/2 | 1 9/16 | 7/8 | 1 13/16 | 1 13/16 | 3 3/16 | 3 3/16 | 1 3/16 |
| CBH2.37x7.63 | 8 1/4 | 9 11/16 | 8 3/4 | 10 5/8 | 11 1/2 | 12 | 5 1/8 | 7 5/8 | 1 9/16 | 7/8 | 1 13/16 | 1 13/16 | 3 3/16 | 3 3/16 | 1 3/16 | ||
| CBH2.37x9.75 | 8 1/4 | 11 13/16 | 8 3/4 | 12 3/4 | 11 1/2 | 14 1/8 | 5 1/8 | 9 3/4 | 1 9/16 | 7/8 | 1 13/16 | 1 13/16 | 3 3/16 | 3 3/16 | 1 3/16 | ||
| CBH2.37x5.5 | 2 | Stacked | 6 3/4 | 13 1/16 | 7 3/4 | 14 | 10 1/2 | 15 3/8 | 4 1/8 | 11 | 1 5/16 | 7/8 | 1 13/16 | 1 13/16 | 3 3/16 | 3 3/16 | 1 3/16 |
| CBH 2.37x7.63 | 6 3/4 | 17 5/16 | 7 3/4 | 18 1/4 | 10 1/2 | 19 5/8 | 4 1/8 | 15 1/4 | 1 5/16 | 7/8 | 1 13/16 | 1 13/16 | 3 3/16 | 3 3/16 | 1 3/16 | ||
| CBH2.37x9.75 | 6 3/4 | 21 9/16 | 7 3/4 | 22 1/2 | 10 1/2 | 23 7/8 | 4 1/8 | 19 1/2 | 1 5/16 | 7/8 | 1 13/16 | 1 13/16 | 3 3/16 | 3 3/16 | 1 3/16 | ||
- Side edge distances for supporting vertical columns must meet or exceed the eside table values for the supported beam.
- For single configuration conditions where fire resistance need not be considered and 5 1/8"≤ carried beam width < 5 1/2", see CBH Allowable Downloads table footnotes for load reduction. For 3 1/2" ≤ carried beam width < 5 1/8", refer to L-C-CBH4XSKEW.
- 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.
- 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.
- 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".
Table 3: Allowable Loads — Wood Carried Beam to Structural Steel
| Model No. | Dimensions (in.) | Carried Beam Fasteners | Carrying Member Weld Qty, Size & Length | Carrying Member Self-Drilling Screws to Steel | Allowable Downloads (lb.) | ||||
|---|---|---|---|---|---|---|---|---|---|
| W. | H. | DF/SP | SPF/HF | ||||||
| Floor (100) | Snow/Roof (115 /125) |
Floor (100) | Snow/Roof (115 /125) |
||||||
| CBH2.37x5.5 | 2 3/8 | 5 1/2 | (13) SDS 1/4" x 6" | (4) 3/16" x 1" | (8) #14 | 5,460 | 5,700 | 3,900 | 4,485 |
| CBH2.37x7.63 | 2 3/8 | 7 5/8 | (18) SDS 1/4" x 6" | (4) 3/16" x 1" | (10) #14 | 6,925 | 6,925 | 5,400 | 5,930 |
| CBH2.37x9.75 | 2 3/8 | 9 3/4 | (23) SDS 1/4" x 6" | (6) 3/16" x 1" | (12) #14 | 9,335 | 9,335 | 6,900 | 7,935 |
- Installation requires tabulated SDS screws to the carried wood beam and either welds or self-drilling metal fasteners (not both) to the carrying steel member. Allowable loads are applicable to either installation.
- Welded loads assume E-70XX weld material.
- Caution: Welding galvanized steel may produce harmful fumes; follow proper welding procedures and safety precautions. Welding should be in accordance with AWS standards.
- Welds must conform to the current AWS D1.1 structural welding code for steel.
- Welded connections should only be performed by skilled, qualified welders.
- Welded connections require a minimum of 3" wide flat surface area to accommodate the width of the connector and the welds.
- Loads are based on attachment to structural steel with a minimum yield strength, Fy, of 36 ksi.
- Self-drilling metal fasteners shall be in compliance with ASTM C1513.
- Self-drilling 1/4" diameter metal fasteners may be substituted for self-drilling #14 metal fasteners. Maximum thickness of framing member must not exceed the maximum total drilling thickness for the metal fasteners.
- To ensure proper installation of CBH connectors with self-drilling metal fasteners, head depth of screws must not exceed 0.250" and head diameter must not exceed 0.500".
- Connections are not evaluated for uplift.
- Minimum required fastener length is the greater of 3/4" and the minimum length required for the fastener to extend through the steel connection a minimum of (3) exposed threads per AISI S240-15, Section C 4.1.2.1.
Code Reports & Compliance
Drawings
| DWG | DXF | RFA | IFC | SAT | |||
|---|---|---|---|---|---|---|---|
