How should deck beams be attached to support posts?

The most effective method for attaching deck beams to support posts is by using machine bolts. This approach is favored because machine bolts provide a strong, reliable connection that can withstand the loads and forces that a deck may encounter, such as weight, wind, and movement over time. Machine bolts are designed with a threading that runs along their length, allowing for a secure clamp between the beam and post when paired with appropriate washers and nuts, ensuring stability in structural integrity.

Nails and screws, while useful for a variety of fastening applications, do not offer the same level of strength or resistance to shear forces as machine bolts do, especially in outdoor conditions where moisture and temperature changes can affect fasteners. Tying with rope is not a viable option for structural connections as it lacks the necessary rigidity and reliability to safely support deck loads. The use of machine bolts aligns with best practices in construction, ensuring both safety and longevity for the deck structure.