Rebar Support
Rebar Support
(OP)
I have recently received information from an associate whom has just returned from the 2008 ConExpo. During the Expo he was approached by several people enquiring as to the extruded plastic rebar support ( bar chairs ) he was he using in an exhibit. He was queried as to where he obtained these plastic rebar support ( bar chairs )as they had not seen anything similar in the States. If this is the case what method is employed to hold the rebar in position.





RE: Rebar Support
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Rebar Support
Thanks for your prompt reply to my query. Can you advise if the use of plastic bar chairs within the States is common practice.
RE: Rebar Support
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Rebar Support
RE: Rebar Support
Thanks for the confirmation. I found it hard to believe plastic bar chairs would not be commonly used on projects in States. Plastic / metal bar chairs are used extensively thru Australia.
RE: Rebar Support
Because they are incapable of supporting men and materials I never like to see the use of these plastic rebar support chairs for elevated slab work.
RE: Rebar Support
Within Australia plastic bar chairs are used extensively in suspended slabs, beams and columns. I have never experienced any failure of the plastic bar chairs, nor have I ever heard of a failure. The plastic bar chairs are more than capable of supporting both materials and men.
Can you direct me to a supplier or manufacturer of plastic rebar chairs within the States as I'm interested as to the differences between the chairs as used within each country.
Thanks for the information.
RE: Rebar Support
All I can tell you is that I inspect suspended slabs daily, and as a result I see broken plastic rebar support chairs daily. I'll take some digitals and see if I can post them. The worst ones are the ones over 6 1/2" because they are made up of two chairs zip-tied together. Any kind of twisting or lateral loading and they just pop apart of fold up.
RE: Rebar Support
Thanks for the information.
The problems I have encountered with the plastic tipped metal bar chairs is the tendency to tip over due to the small footprint plus they are only designed to carry one bar. The plastic chairs are combinations where both top & bottom steel of the mat can be carried with a single chair.
Metal tipped bar chairs are available and utilized by some people given the size of bar chairs range from 20 mm to 360 mm high. The metal chairs are commonly used during slab on ground construction
RE: Rebar Support
I have spoken to our local rebar suppliers, both small and large outlets, and queried the ratio of sales between plastic and metal bar chairs.
The general opinion was for very 1000 bags of plastic bag chairs sold they will sell less than 10 bag of metal bar chairs.
I can only assume from your previous statements the relative strength of plastic bar chairs are different, be it due to the materials, design or fixing practices.
Thanks
RE: Rebar Support
RE: Rebar Support
Thanks for your detailed reply to my initinal query. As a general observation it appears the building practices within the US involves a wide variety of bar chairs.
Again many thanks.