EN 12811-1 PDF
Find the most up-to-date version of EN at Engineering Buy EN TEMPORARY WORKS EQUIPMENT – PART 1: SCAFFOLDS – PERFORMANCE REQUIREMENTS AND GENERAL DESIGN from SAI. Specifies performance requirements and methods of structural and general design for access and working scaffolds. Requirements given are for scaffold.
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The innovative technologies like Parametric Modelling, Template Analysis and TrueAnalysis, together with advanced analysis options covering different types of non-linearity enable the engineer to perform real Computer-Aided-Engineering in the field of scaffolding design.
SCIA Scaffolding offers different approaches for modelling of different types of scaffold. The user chooses what best meets their current needs. Their 12811- advantage is their versatility.
Modular systems are defined as systems in which the transoms and standards are separate components. The standards provide facilities at pre- defined modular intervals for the connection of the other scaffold components. One of the main advantages is a short erection time.
Scaffolding checks EN (esasd)
Frame systems are a special type of modular systems in which standards and transoms are already welded together as fixed frames. All standard modelling and manipulation copy, move, mirror, etc. In the case a 2D or 3D CAD model of the scaffold is available, this is directly imported as an analysis model. Even an architectural model is imported, which allows the user to model the scaffold next to the existing building. In addition, any pre-prepared User Blocks, i. Engineers who deal with the design of scaffolds regularly will definitely welcome the possibility to prepare tailor-made templates for all types of scaffolds they have to handle.
The advantage of using templates is that all common data e. The analysis of the scaffold includes proper defi- nition of loads and combinations, calculation and design in compliance with the scaffolding-related code. Template Analysis and Load Generators. Templates save a lot of effort as 1281-11 may have predefined all required load cases and enn. Load Generators enable the user to define the loading plane and the program automatically distributes the loading on all members within that plane.
This is for example used for generation of wind loading on the scaffold. SCIA Engineer uses a stability analysis to determine the buckling shapes of the scaffold, which in turn are used as imperfections for the full second 122811-1 analysis. Other calculation features are used for handling of various specifics of scaffold structures: In the ultimate limit state, the scaffold members are checked according to the capacity check defined in EN In addition to the specific scaffolding checks, full design and check of the structure according to EN is also available for those scaffolds which do not meet the EN prerequisites.
Moreover, users can evaluate deformations of the scaffold and even perform a check on the relative deformations. This is particularly important for ledgers that support floor boards. SCIA Scaffolding allows for an accurate modelling of different scaffolding components including their appropriate specifics.
Diagonals are typically attached with an eccentricity due to the geometry of the attachment between the standards and the diagonals.
Temporary works equipment – Part 1: Scaffolds – Performance requirements and general design
In addition to the eccentricity, a special behaviour of diagonals in modular systems is that they mostly have a small gap along their length, caused by a slight margin between the pen and hole. If specific test results for the diagonals of modular systems are available, the stiffness derived from the tests is accounted for using a translation spring.
SCIA Scaffolding integrates an extensive library of couplers which contains the different types given in Annex C to EN including their stiffness. The user can also add their own couplers in enn open library.
Scaffolding structures typically have two types of floor systems: The metal floor boards are accounted for in the stiffness of the analysis model. If wooden planks are used, however, the stiffness of the planks cannot be accounted for since the planks are put loose on the transoms. In this case, the planks are modelled as an extra load.
Base jacks at the bottom of the scaffold feature specific behaviour. In most cases, the base jacks rn not fixed to the ground.
Moreover, the horizontal resistance is purely dependent on friction. This is modelled using friction supports. A separate module [see esadt. The generated images can be edited, combined with other drawings and inserted in a paper space gallery. All drawings remain connected to the original model, which means that they are automatically regenerated after any modification of the model. Input of initial deformation of structures for scaffolding users, together with member check DIN part 1 and connection or scaffold coupler checks for scaffolding structures according to EN The Eurocode steel code check has been extended for the design of scaffolding projects.
Additions have been made for:. In typical scaffolding projects, columns in a frame are considered continuous; however in this case, the connection between the columns is typically a flexible hinge.
This means the system length should go on beyond the flexible spring. However, in former SCIA Engineer versions the system length is automatically stopped at the node if a hinge, either free or flexible, is found.
In SCIA Engineer the determination of system lengths and buckling lengths beyond a node with a flexible hinge is different from the standard solution where the system and buckling lengths are 1211-1 by the flexible hinge and will be cut at the level with the hinged node. When the scaf- folding functionality is selected this determination ignores the node with the flexible hinge and the system length will automatically go beyond this node and will therefore not consider it as a divider for the buckling lengths.
Full integration in the main graphical user interface.
Integrates complete modelling, analysis and drawings. Semi-automatic determination of buckling lengths.
Specific checks according to EN and EN