Building a safe and sturdy deck requires careful attention to the connections between beams and posts. Properly assembled beam-to-post connections are essential for resisting gravity, lateral, and uplift loads. This blog will cover the building code requirements for multi-ply beam assemblies and beam-to-post connections, and provide solutions from Simpson Strong-Tie to ensure your deck meets safety standards.
Multi-Ply Beam Assemblies
Building Code Requirements
For multi-ply beam assemblies, it is crucial to use the right fasteners to ensure the beams are securely joined. The building codes specify the following requirements:
- Fastening Beams: Deck beams must be fastened together with two rows of 10d (0.128″ x 3″) box nails minimum at 16″ o.c. (on center) along each edge.
- IRC 2018/2021 Section R507.5
- IBC 2018 Section 2304.10.1
- IBC 2021 Section 2304.10.2
Alternatively, the Strong-Tie® SDWS Framing screw can be used in place of 10d box nails when installed in a configuration with 16″ o.c. spacing.
Beam-to-Post Connections
Importance of Proper Connections
At the point where a beam meets a post, the connection must resist various loads to ensure the stability and safety of the deck. This is true whether the beams are solid sawn or comprised of multiple members, and whether they rest on top of the post or are fastened to the side.
Building Code Requirements
- Beam Attachment: Deck beams must be attached to wood posts in accordance with Figures R507.5.1(1) and R507.5.1(2), or by other equivalent means capable of resisting lateral displacement.
- IRC 2018/2021 Section R507.5.2
- Post and Beam/Girder Construction: Positive connections must be provided to ensure against uplift and lateral displacement.
- IRC 2018/2021 Section R502.9
- IBC 2018 Section 2304.10.7
- IBC 2021 Section 2304.10.8
Simpson Strong-Tie Solutions
Post Caps
Post caps provide a secure connection between beams and posts, ensuring stability and compliance with building codes.
- BC/BCS Post Cap: Suitable for single-member solid sawn beams or double/triple 2x’s to a 4x/6x post. Available with ZMAX® coating or stainless steel.
- LCE/AC Post Caps: Two-piece caps for flush post and beam sides, installable before or after lumber is in place. Available with ZMAX coating or stainless steel.
- LPCZ Post Cap: Adjustable for beams smaller than post width, features ZMAX® coating.
- PCZ/EPCZ Post Caps: Connect beams at the top of the post, installation without shims. Features ZMAX coating.
- CCQ/ECCQ Beam-to-Post Connections: Strong connection for column-beam combinations, available in HDG or stainless steel.
Alternative Connections
For specific beam-to-post assemblies, alternative connections may be more suitable.
- Beam-to-Notched Post, Non-Spliced: Uses Strong-Drive® SDWS Timber or Timber SS screws.
- RTC44Z and LCE4: Provide mitered beam-to-post corners, available with ZMAX coating or stainless steel.
- Continuous Beam over 6x Post: Uses Strong-Drive SDWS Timber screws.
- Mitered Beam over 6x Corner Post: Uses Strong-Drive SDWS Timber screws.
- Alternative Diagonal Bracing: Uses Strong-Drive SDWS Timber, SDWS Timber SS, or SDWH Timber-Hex HDG screws.
- KBS1Z: Connects diagonal bracing to beams and columns, available with ZMAX coating.
Decorative Options
For aesthetic and functional enhancement, consider using decorative post bases.
- APBDW Decorative Post Base Wrap: Wraps around the MPBZ, matching the style of other Outdoor Accents® connectors.
Post Bases for Existing Concrete
When installing post bases on existing concrete, post-installed anchors are required.
- SET-XP® High-Strength Epoxy Adhesive: For threaded rod and rebar, suitable for dry or water-saturated concrete.
- SET-3G™ High-Strength Epoxy Adhesive: Suitable for various conditions including submerged or water-filled holes.
- AT-XP® Fast-Cure Acrylic Adhesive: Ideal for cold temperatures, suitable for threaded rod and rebar.
- Stainless-Steel Titen HD® Screw Anchor: Fast installation with long-lasting corrosion resistance, available in various diameters and lengths.
For more detailed information on these products and their applications, visit strongtie.com.
Conclusion
Ensuring proper beam assemblies and beam-to-post connections is crucial for building a safe and durable deck. By following building code requirements and using high-quality Simpson Strong-Tie products, you can create a deck that meets all safety standards and withstands various loads. Always consult with a qualified professional to ensure your deck’s construction is compliant and secure.
For immediate service or consultation, you may contact us at Allied Emergency Services, INC.
Contact Information:
- Phone: 1-800-792-0212
- Email: Info@AlliedEmergencyServices.com
- Location: Serving Illinois, Wisconsin, and Indiana with a focus on the greater Chicago area.
If you require immediate assistance or have specific questions, our human support is readily available to help you.
Disclaimer: This article is intended for informational purposes only. For professional advice, consult experts in the field.
