Friday, May 13, 2011

Tying Rebar



Since metal reinforcement is so important to structural concrete
I wanted to inspire all of those who may have to tie rebar 
for their next project.



These first five photos are from a large bridge project
 in San Carlos, Sonora that I covered in the posts:


I found the rebar work to have a beautiful, sculptural quality to it.


Once the concrete is poured it won't be seen again,
if they did the job right.




The next time you have to pour a footer
 think how complicated it could be.


These last two photos are a completely different type of project.

What is interesting to me is that the rebar is tied together every 8" to 10",
where as when we do footers the rebar is seldom tied together,
similar to the way we seldom ever put blocking in our wood framing 
even though it greatly improves the strength requiring less lumber.


For more on this see my posts:

1 comment:

  1. The bracing in a stud wall has 2 purposes. One is to brace the wall. The second is to act as a fire stop. In a finished wall the stud cavity acts like a chimney and can aid in the spread of a fire. The blocking acts to cut off the chimney effect.

    Please note that a concrete beam can take almost no tensile stress. the steel takes all.
    Bridge beam loading is complex. Tension, torsion and bending all stress the beam. The complex steel pattern is designed to handle these stresses. Placement is important, hence the welding. Look for an intro text in concrete design. You'd get alot from it.

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