The Key2Concrete construction database has been split into topic areas to help you find the article you are looking for. Use the menu below to browse to the subject you require, or alternatively, use the contents, or search facility above.

Connections & Fixings

Design & Standards

Environment

Information Sources

Joints & Interfaces

Lifting & Transportation

Materials

Miscellaneous

Holes & slots

Published Date: 17/08/2009
Download Document

Holes in fittings are often slotted to increase tolerance. When used with sections that are cold-formed by bending, such as angles or channels, sufficient space must be allowed for washers to sit ‘flat’ before they meet the radius of the bend. The suggested values in the tables below are based on an internal bending radius of ‘2t’ for the plate.

They also give the recommended edge distance to edges.  The edge dimensions are nominally rounded up.  The minimum dimensions are for detailing purposes only.  Design requirements may increase the figures.

 

Minimum dimensions of slots, holes & washers

  ©2012 Cliff Billington on behalf of J&P Building Systems Ltd

Key2Concrete and J&P Building Systems: The content of this website and of the documents accessible within it, is provided in good faith. While every effort has been made to ensure that the contents are correct at the time of writing, details do change. Amendments will be made as and when necessary; website users and readers are advised to check for the latest edition. J&P Building Systems are not liable for any inaccuracies in the information provided. All advice from Key2Concrete and J&P is intended for use in the UK only by those who will evaluate the significance and limitations of its contents and take responsibility for its use and application. No liability (including that for negligence) for any loss resulting from such advice or information is accepted.