(1) Explain your problem, don't simply post "This isn't working". What were you doing when you faced the problem? What have you tried to resolve - did you look for a solution using "Search" ? Has it happened just once or several times?
(2) It's also good to get feedback when a solution is found, return to the original post to explain how it was resolved so that more people can also use the results.
Can we list type of stagging and paneling for formwork.
Knowing technicalicties and types of formwork will help planners to list down the activities for planning and will also help to understand the methodology.
We may list down the type, componenets and its definitions and activities for different type of formworks like conventional formwork, doka formwork etc.
Printer-friendly version
Send to friend
hi Brij,
For the types of formwork you are refering to such as Doka and also DropHead Systems for example, the real answer in my opinion is:
The time to be used by the scheduler is highly dependent on the project and should be extracted from both a construction cycle calculation report (could be done quickly if you have the loads) and project manager/superintendent/etc to take into consideration any site+resource constraints and so on.
Basically , you need to take into consideration what is the construction cycle calculations. These would usually roughly indicate to you when can you remove your props , how many slabs should you keep back-propped, depending on the type of slabs (suspended RC Slab, Post-Tensioned RC Slab...etc..) , the loads present (Dead Loads, Live Loads, lateral Loads...etc..) and the type of Formwork in use.
This should be your starting point but you shouldn't stop there.
The step mentioned above falls under the umbrella of the Planning Process. That same planning process should also include brainstorming sessions with project team members. These sessions would also provide you with more information as they relate to what constraints exist around the concerned activity, the resources available for such an activity, a rough estimate of the expected productivity of those resources, any other constraints , assumptions and so on and you can probably get a rough estimate from the site PM the superintendent who are responsible for direct control of the works (maybe as a 3 point estimate which you might have to apply a correction factor to eventually).
The given information in the planning process should lead you to have enough information to develop your schedule appropriately.
Best Regards,
Roland
Hi Mike,
I feel you are refering to removal of side form and soffit (bottom form).
I do absolutely agree that removing bottom of slab is after 14 days and for beam is after 28 days as per indian codes and it must be taken into account while calculating the schedule.
But it is equally important to take the time taken to remove the props (supports of forming panels) which take a hell lot of time especially when we are using conventional forms like of bamboos / scaffolding pipes. But now a days there are preformed formwork like doka avilable which does it rapidly and with minimum safety issues.
I am exactly refering to these type of other systems which all planners have come across and can provide inputs regarding its erection and stripping process + activities as form works eat away @ 25% of cost & 40% time of our projects.
Hi Brij
Whatever type of slab formwork you are using there is usually a two stage removal which is invariably ignored by planners.
Stage 1 - Remove slab forms
Stage 2 - Remove back props
The point of removal depends on the curing periods - 3 to 5 days Stage 1 28 days stage 2.
These curing periods can be replicated by FS Lead lag links with calendar days durations.
(Note to opther PP members - This is the only time I will advocate the use of lead lag links)
The problem with use of calendar duration lags is that if they end in a holiday period any criticality is lost on downstream tasks.
Best regards
Mike Testro
Email: PPadmin@planningplanet.com
Replies