HatterScaff
Well-known member
Any of you designers out there used this system? and if so is it any good?
Eurocodes - Scia Engineer Eurocode modules
Eurocodes - Scia Engineer Eurocode modules
Hatter..
I've not used it but I have had the guy from CADS in the office to demonstrate it's capability.
There's no question that its a powerful tool and if doing 2nd order analysis on scaffolding is a requirement you have then it's probably the best on the market...
However, one of the main functions of TG20 is to remove the need for second order analysis by allowing you to analyse the scaffold by consideration of effective lengths and overall capacity checks (for combined axial and bending).
We have considered it and if there was a general requirement over and above TG20 to use second order anaylsis on scaffolding then we'd look at buying it. Until that happens and a justified reason for doing so occurs then we won't get it... afterall, its pretty darn expensive!!
Ben.
Mark,
Tables 22 & 23 are for 'basic' independent scaffolds only. As TG20:08 states that you can have a pavement lift of 2.7m in a basic independent scaffold, I believe this is partly where they have arrived at this figure. The independents are also constructed using transoms on singles only at most bays so you are relying on the strength of the ledger in bending to transfer the buckling load to the adjacent ledger braced frames and tie points to justify a 2.0m effective length. If you can prove that the effective length of the standard is 2.0m, which it very often is in designed scaffolds, you can use the 29.1 kN load for 'as new' tubes from table 20.
Mark..
Biffo is spot on. Its very rare that we actually design an independent so in the majority of designs we are actually using the lift height as Le. One point to note, structural transoms should be provided at every ledger braced bay on a sheeted independent and the same on non-sheeted independents above 15m high (see 10.2 page 51). So only the non-ledger braced bays are fixed with singles... and as biffo says, its then down to the ledger to effectively restrain the standard.
You can use App. E reasoning if you like for independents but you just need to make sure you face brace up the inside row of standards and ground all the braces in the first lift.
B.