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Account for wall transfer loads on one-way deck

As far as I am aware, RSS does not track the load transfer when a wall is sitting on a one-way deck without a supporting beam or wall directly below.  The loads from the wall above the deck is "lost".  My firm does a lot of multi-family construction with light frame wood construction over a precast concrete or PT podium.  We like to use RSS to help track loads to the footings, but we spend a lot of time transferring the loads from the wood bearing walls above (modeled as "other" type walls) onto the podium level through the use of manually inputted line loads.  Transfer loads from columns are properly accounted for in RSS... why not walls too?

Brian Genduso
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    Any movement on this idea? Maybe it is more difficult than I imagine, but I know there are a number of people interested in this. 

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    Came here to ask for exactly this. When I wall sits perpendicular to a one-way deck it would be great to have the program transfer the load to the supporting members in a one-way fashion. No need to "fan-out" the load. Use the same concept as gravity walls. Thanks for posting this idea. 

  • Offline in reply to Seth Guthrie

    Most of the time, yes.  The majority of podiums for the types of projects we deal with are precast concrete.  However, you are indeed correct that for a PT slab we would use a two-way concrete slab, and I can see how you were confused by the phrasing of my comment.  I used a podium project as an example.

    That being said, we also find that the wall load transfer issue is relevant to other project types.  For instance, we occasionally use RSS to help track loads and do design work for very large, complicated single-family residences.  Those structures are 3 or 4 stories tall and require steel beams and columns due to large open spaces or the need to support masonry veneer.  We use one-way deck as a substitute for the simple span wood joists and trusses that frame out the floors and roofs, and "other" type walls for the wood stud walls.  RSS is a great tool for designing the steel and footings, but the lack of wall load transfer on one-way deck definitely complicates our design process.

  • I'm confused, is your podium slab a one-way deck? Surely as a PT slab it's a two-way concrete slab (and no supporting beam is required in that case). 

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