dowels through shutters 2

[hussamabslh]

Hi,
I have 2 perpendicular walls which for some reason cannot be cast simultaneously and according to design drawings the connection between he two walls is a stiff connection, thus dowels must pass through shutters is there any way to do this (other than couplers)? with considering a dowel every 10 cm(I prefer not to drill the shutters). looking forward to hear your thoughts..
many thanks

 

[hokie66]

A plan detail would help, or a copy of the detail on the design drawings. Why don't you ask the design engineer?

 

[hussamabslh]

please find the attached dwg file below.
my case is how to access T16 dowels @150 mm from the pit side to the core leg. the pit side will be executed before the core leg.(without interrupting the shutters if possible )

 

[hokie66]

Many/most of us don't have AutoCad. Perhaps you can make your attachment into a format readable by the masses.

 

[JAE]

You either use form-saver couplers (check out

http://www.erico.com/products/FormSaver.asp)

Or you drill your shutters (formwork).

Or you post-install adhesive dowels which aren't as reliable.

 

[paddingtongreen]

JAE is correct.

Michael.
"Science adjusts its views based on what's observed. Faith is the denial of observation so that belief can be preserved." ~ Tim Minchin

 

[hokie66]

I agree that Lenton couplers are good gear, but in a joint of two perpendicular walls, they may not solve all the problems. The bars have to be turned into the couplers, and with bent bars, that is not always practical. As well, vertical joints at wall intersections may actually need to be monolithic in some structures. We had a thread here not too long ago where the external walls of a treatment plant pulled away from the internal walls where they had been cast separately. That illustrates why the design engineer, rather than a construction engineer, should make the decision.

 

[hussamabslh]

I was wondering if I can bend my bars inside the formwork (at the outermost edge) and then bend them back straight after moving the shutter.. (I prefer not to use couplers because it is not allowed for bars less than T25 as per consultant's notes)

 

[hussamabslh]

hokie 66 you are right about casting monolithically , but its is always about discontinuity of shutters (subcontractors nagging) .
thanks for your time

 

[hokie66]

If the consultant has requirements about where couplers can be used, you should be asking him these questions. As to bending the bars across the end of the wall, then rebending them, if I were the consultant, the answer would be NO! Actually HELL NO! Anyway, I would be surprised if straight bars at the ends would suffice for the tee connection.

Don't worry about subcontractors nagging, just pull them into line. Isn't that your job?

 

[hussamabslh]

hokie66 you have much more experience than me, but if u take a look at the pdf file I attached you will notice that the lift core wall leg is connected to a 2.5 meter thick pit edge so we do not have a problem regarding anchorage or embedment, if I understood what yo mean in " I would be surprised if straight bars at the ends would suffice for the tee connection."
Actually what I worry about is to keep smooth relationship with subcontractors, and if I can find alternatives to reduce there work load and gain time, that would be an advantage for me and might be usefull later on.
hokie66, JAE, paddingtongreen it is an honor for me that you are reviewing my thread

 

[hokie66]

Then it does sound like you have plenty of thickness for embedment. But the decision on bending and rebending the bars should still be made by the "consultant", assuming that means the design engineer.