Post-Installed Rebar - Column Fence to Top of Retaining Wall

[drago8]

Dear All,

Referring to the above mentioned subject, the situation here is that the Client/Architect already specified to build fence with column and beam however, the Contractor have constructed perimeter wall (retaining wall) without providing starter bar for the column fence. The column fence will be built on top of the retaining wall. Thus, I am planning to drill the retaining wall and provide starter bar. My query is how do I calculate the embedment depth, overlap length/anchorage length and what size of starter bar shall I use. My design will be in accordance to British Standard.

I have looked through Lokfix Fosroc Data Sheet for the embedment depth of the starter bar/new rebar to the existing RC members and I saw that for starter bar of size 12mm diameter, the embedment depth would be 225mm min. How do I check if this embedment depth will be enough for my post?

Thank you for your help.



#LoveWins

 

[structSU10]

You can evaluate the strength of the starter bar as shown on the original contract documents. From that strength, you can design a new post installed starter bar with at least the capacity of what was shown on the original contract documents. more than likely it will need to be embedded at least the depth the cast in starter bars required, and likely a little deeper, depending on the epoxy / system you choose ands its bond strength.

 

[RHTPE]

Be mindful of wind loading on the fence and its effect on the retaining wall design. If not anticipated in the wall design, you may have problems.


Ralph
Structures Consulting
Northeast USA

 

[KootK]

This document by Hilti Europe should get you most of the way there. They also offer free software that employs the same methods.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[TehMightyEngineer]

No document attached.

Professional and Structural Engineer (ME, NH)
American Concrete Industries

http://www.americanconcrete.com

 

[KootK]

Aforementioned doc: Link

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.