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Adjusting Allowable Deformations

Figure 01 - Adjusting Allowable Deformations

02/25/2019

002506

Markus Baumgärtel

Stand-Alone Programs

CRANEWAY

A crane runway has small cantilevered girders at the start and end, so that the wheels go as far as to the column. In these areas, the deformations show invalid values. What should I do?

Answer

According to the current recommendations, the deformation analysis for a cantilevered crane runway girder is performed using the formulas:

$\mathrm{δz}\;\leq\;(2\;\cdot\;l_{\mathrm{cantilever}})\;/\;\mathrm{allow}.\;\mathrm{deformation}$

$\mathrm{δz}\;\leq\;\mathrm{allow}.\;\max.\;\mathrm{deformation}$

In this case, the program cannot distinguish whether the design for the analyzed crane runway girders is irrelevant or not. This decision must be made by an engineer.

Usually, a simple note in the structural analysis is sufficient for an examiner. Alternatively, you can consider whether such a girder is even relevant for the design of the entire crane runway girder and, if necessary, neglect it when entering the geometry.

The webinar about "Design of Craneway Girders According to Eurocode 3" gives you more information about designs with CRANEWAY. You can find it under Links below.

Keywords

cantilever crane runway girder deformation cantilever deformation analysis allowable deformation crane runway girder

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Associated Products
Stand-Alone Steel Structures
CRANEWAY 8.xx

CRANEWAY 8.xx

Stand-Alone Program

Design of crane runway girders according to EN 1993-6 and DIN 4132

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