Sure Bill - Here it is:
QUESTION: My question is when is a lateral load connector required? In section R502.2.2 Decks, it is stated that "decks shall be positively anchored...for lateral loads" Does this mean that the only option is a connector like the one in figure R502.2.2.3, or that the lag bolts will suffice as lateral load connectors. Does the seismic or wind zone matter when requiring one of these connectors? Do any factors come into play when requiring lateral load connectors, such as height or a deck connected to the primary structure on two walls? This is really more than one question, but there seem to be many interpretations on this code section and I want to make sure I am enforcing it correctly.
ANSWER: Decks that are supported by the primary structure, in order to satisfy R502.2.2 with respect to both vertical and lateral loads, are permitted to be connected with lag bolts. The must be as prescribed by Sections R502.2.2.1.1 and Table R502.2.2.1. The seismic, wind or height, as design factors for the proposed deck, are not issues in this case. Outside of these prescriptive parameters, accepted engineering practices are permitted.
Maybe I'm being harsh by saying this is vague, but it seems to say that if you can accomplish the lagging required in R502.2.2.1 then the lateral load connectors are not required - simple enough. But I would think that when the lagging requirements cannot be met, then more than 2 lateral load connectors would be required to secure the deck to the primary structure, especially on a large deck. I wonder how we are supposed to determine these additional connections (lags, pins, etc.).