Anchorage of Positive Moment Reinforcement

[IreStruEng]

Clause 8.3.1.3 of AS 3600 states that "Not less than one half of the tensile reinforcement required at midspan shall extend past the
face of the support for a length of 12db, plus a cog or an equivalent anchorage;"

For 16mm diameter reinforcement, 12db = 192mm. Adding in cover and the thickness of the supporting wall/column is going to need be >=230mm.

Say two 16mm dia. bars are required at midspan of a simply supported beam for the flexural reinforcement. If both bars are taken 6db (96mm) past the face of the support is that clause deemed satisfied in your opinion?

 

[JAE]

Not technically by the language of the clause.
Doubling the bars required and halving the embedment conditions doesn't usually work out.