I have a 16' x 20' deck with 2x6 lumber flat supported on joists that are supported on beams. A wood frame is at one end and concrete shear walls are at the other. Glass panel railing is at the perimeter of the porch and large wind pressures result (V=105 mph). How are the lateral pressures distributed to the supporting MWFRS system (frame and walls)? As discussed flat 2x6 lumber with spaces in between are not recognized by the codes; therefore is horizontal bracing (similar to metal buildings) utilized to distribute the loads. In an online paper rotation of the flat lumber during a lateral event introduces local moments at the nailing and results in ripping apart the top of the supporting members. Any advice would be appreciated. I have seen in photograph via Simpson an entity installed a let-in brace on the underside of the joists and in the field I have seen flat metal strapping attached to the bottom of the boards. I assume for small porches that engineers are treating the deck system as a rigid body, similar to a trellis, and just simply distribute the loads to the vertical lateral force resisting system.
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
Improving the battery life of our devices remains one of the tech industryâ€™s biggest challenges, and the most inefficient draw on power comes from the display, more specifically, the backlight that illuminates most displays. Download Now