Tilt-up hooked dowels
Tilt-up hooked dowels
(OP)
For tilt-up wall panels (especially 5.5" ones), how would you typically provide hooked dowels to the slab pour strip (or to a concrete mezzanine floor if needs be), since the hook development length is too long? It seems like a commonly overlooked error - even the TCA engineering manual shows it this way. Epoxy dowel development lengths are shorter but the contractor won't be happy about all that drilling. Thanks for your thoughts on this.





RE: Tilt-up hooked dowels
the majority of the slab is poured to give a surface to cast the panels on. a ~4 strip along the edge where the slab isn't cast along the perimeter. 90 degree hooks are cast in the wall with the development length hanging out in the air perpendicular to wall. the exposed rebar is cast into the additional floor strip of concrete after the roof-steel is done. it's been a while since i've seen one, i'm sure someone else will have better design answers. I think i recall seeing one project have walls cast with mechanical splice ends to screw into.
-dsg
RE: Tilt-up hooked dowels
csd
RE: Tilt-up hooked dowels
RE: Tilt-up hooked dowels
RE: Tilt-up hooked dowels
I think it gets boiled down to engineering judgment in the end. An allowable stress approach may provide a rational method since, if you cannot develop the yield strength, it doesn't make much sense to use an ultimate- or limit-state approach to the strength of the dowels we're discussing.
RE: Tilt-up hooked dowels
csd
RE: Tilt-up hooked dowels