What is a Block Out in Column?

[Rovin069]

Could anyone help me in the Block out in the column? i don't know what it looks and it uses. hope anyone could give me some pics of block out with column. thanks

 

[wannabeSE]

For some information on column block outs see

http://www.eng-tips.com/viewthread.cfm?qid=225099

Diamond shaped block outs are most common in my part of the world. See

http://www.all-concrete-cement.com/diamond-blockouts-are-they-necessary.html