Rebar - Standees Question
Rebar - Standees Question
(OP)
I have 36" slab with 2 mats of #6 @ 12" oc/ew. The problem is that the bottom mat is 9" off the ground. Does ACI or CSI say anything about this? My detailer is telling me that it's not standard to have standees directly on the earth. I don't believe that it is standard to use 9" continuous high chairs! ANY HELP???





RE: Rebar - Standees Question
RE: Rebar - Standees Question
RE: Rebar - Standees Question
RE: Rebar - Standees Question
RE: Rebar - Standees Question
RE: Rebar - Standees Question
RE: Rebar - Standees Question
or water issues. Using concrete bricks as mentioned by a
a few other respondents provides a stable support for reinforcing steel. It also ensures proper cover, rebar embeddment and bonding. Dirt/mud and ensuing sinking or movement of rebar during pour is eliminated.
RE: Rebar - Standees Question
What jurisdiction governs? Building codes usually require 3" minimum clearance to reinforcing if concrete is to be placed against earth. Where is the bottom mat in the design? Nine inches seems excessive.
Standees, as stated by others, have a problem sitting on soil/sands. Dobies (concrete blocks w/tie wire embedded) are usually better for bottom mats. They are cheap and readily available.
There is also a potential for corrosion to travel up steel standees right to the rebar. The increased cross section necessary for tall standees would add to this problem. In wet or corrosive soils some specs call for plastic, coated steel or stainless steel standees if the designer elects not to allow dobies.