Zzzzzzzzzzzzzzzzz...............

[bentech]

that sounds can wake a fucker up you know...

little background
anything concrete you see
has inside it a layer of steet
a skelaton basically

before the skin goes on a team of workers build the confines of the concrete that gets poured into a shape the skeleton of steel that will end up precisely positioned inside this mudded contraption

the idea is the steel protects the concrete mud from certain forces and the concrete protects the steel from water getting at it

thus the needs for a couple inches of it inbetween the air and the reinforcements

[Oldjoints]

Centuries ago in my youth I worked for a pre-stressed concrete company. They took cables and pulled them to some ungodly amount and then we would wire tie cages and insert threaded rod. This was all done inside a form that they would pour in cement and when it was at the exact time of cure they would cut the stressed cables and this would actually slightly bend the whole thing slightly up which was suppose to make it much stronger. They were used a lot in parking buildings as the floor that got drove on.

[bentech]

I grew up in Azusa and there was a big manufacture of those panels nearby

ive started to see stamps in the floor of garages which say "do not cut!"

whereas the panels oldjoints is talking about the steel is pre-tensioned before the concerete is poured in the homes case the steel isn't tensioned until after the concrete has cured...

[bentech]

the way I understand it is

given you've built the box that your going to pour the concrete into

you want steel running throught whatever your building and the deal with steel is that in rod form it has lots of irregularity

so when buried in concrete theres lots of these little tiny shelfs to catch and hold and they end up with the test numbers which make it a good material these days...

shit,
gotta work load to day
will get back

[Oldjoints]