European Recommendations on the Stabilization of Steel ... - Xs4all

More documents

Recommendations

Info

Annex 1: Practical ConsiderationsANNEX 1: PRACTICAL CONSIDERATIONS1. GENERAL REMARKSThis document introduces the design principles of sandwich panels, which are used asstabilizing elements for single members of the supporting structure such as beams, purlins andcolumns. The role of the sandwich panels is more demanding compared to the traditional useof the sandwich panels, in which the panels carry the pressure and suction loads exposedperpendicular to the face of the panels only. It shall be noted, that the document introducesrules to stiffen single steel members against buckling and lateral buckling using sandwichpanels. The document does not cover the cases in which whole buildings or units are stiffenedwith wall and roof panels.The practice of design, building, proofing and inspection varies in different countries.However, principally the same tasks have to be made during the building process and shall beconsidered during the use of the building. This chapter makes remarks on some points, whichhave practical importance. The use of sandwich panels and the ways and methods of practiceare under development phases in the near future. Therefore, the documentation of the designand building work is highly important concerning the later use of the building.2. RESPONSIBILITIES AND TASKS2.1 General InformationSandwich panels used to stabilize steel structures become an integral part of a loadbearingsystem. Therefore, the design of such a structure requires a constant flow ofinformation between• the owner and user of the building• the designer of the steel structure• the designer of the sandwich panels• the manufacturer of the panels• the installer of the steel structure and sandwich panels on siteEach of the mentioned partners has the responsibilities and obligations towards theothers. The responsibility may also cover the tasks of another partner, or there are additionalpartners such as an external supervisor. The following paragraphs give hints to assure the flowof information and to help to define the responsibilities and obligations.2.2 Owner or UserThe owner or user has to be aware of the role of the sandwich panels as stiffeningcomponents in the building. He shall consider the role of the sandwich panels in latermodifications and updates of the sandwich panels, steel structures and the whole building. Hehas to take care of the updates of the information in the documents and drawings.49
<strong>European</strong> <strong>Recommendations</strong> on the Stabilization of Steel Structures by Sandwich Panels2.3 DesignerAdditional information about the sandwich panels and the fastening needed for thestabilization of the supporting structure shall cover the rotational stiffness and the in-planeshear stiffness, and the strength of the sandwich panels and connections and the shear stiffnessand shear resistance of the fasteners used to fix the sandwich panels to the supportingstructure.The designer of the sandwich panels shall verify the resistance of the sandwich panelsand fastenings to meet the requirements given by the primary loads to the panels and by theadditional loads caused by the stiffening of the single steel members. The designer shallprepare drawings which show the types, materials and dimensions of the sandwich panels,and the types, materials, dimensions and positions of all fasteners and possibly the order to befollowed in installing the fasteners on site. He shall define the tolerances to be fulfilled infastenings. The design shall be based on relevant national and <strong>European</strong> standards andtechnical approvals.The designer of the steel structure needs to know the properties of the sandwich panelssuch as the allowed span length in longitudinal direction, required support width, shearstiffness, and torsional restraint, and the required type, number and positions of fasteners. Heshall define the stiffness needed to support the supporting structure against buckling failure onan acceptable level. On the other hand, the number of fasteners might affect the load-bearingcapacity of the sandwich panel such as the support reaction capacity and the reduction of thewrinkling stress at the intermediate supports under uplift loadings.Thus, the designer of the sandwich panels shall know the structural requirementsresulting from the stabilization of the supporting structure and possibly, based on therequirements of the design of the steel members of the supporting structure, re-check theresistance of sandwich panels and fastenings.At the end of design process full assembly documentation shall be prepared and deliveredto the owner of the building and/or to the partner, who is responsible for the assembly.2.4 Manufacturer of sandwich panelsThe sandwich panels used as stabilizing elements shall fulfil the requirements of EN14509 [24] shown by the CE-mark of the product (see chapter 1.2) and the application rangegiven in this document. Depending on the case and practice, the manufacturer of the sandwichpanels shall provide additional information about the stiffness and resistance of the fasteningsor about the shear stiffness and torsional restraint of the stabilizing system. The possibledocument with additional information compared to that given in CE marking according to EN14509 shall be based on test results and calculations.2.5 InstallerBefore starting the assembly, the installer shall perform the following controls:• Check and verification of documentation for assembly: relevant drawings, list offastening elements, details for fixing, assembly and fixing sequence50
Page 1 and 2: Publication 379W056 Sandwich Panels
Page 3 and 4: European R
Page 49: European R
Page 69 and 70: CIB CommissionsMembers can choose t
Page 71: CIB General SecretariatKruisplein 2

European Recommendations on the Stabilization of Steel ... - Xs4all

Create successful ePaper yourself

Delete template?

Save as template?