Rodney

I suspect that the term tread length is an Americanism for what BS 5395-1 calls tread width (number 12 in illustration below). The tread width is the full width of the tread, the going is measured nosing to nosing. The going and tread width will be equal if the stair has no overhang. In the case of the illustration below number 13 is the going.

Regards

David Dropkin FRSA NRAC Consultant
Associate

Inclusive Design
Buro Happold Ltd
17 Newman Street
London W1T 1PD
United Kingdom

T : +44 (0)20 7907 3573
M : +44 (0) 780 951 0169
E: [log in to unmask]
www.burohappold.com

This transmission is confidential and intended solely for the person or organisation to whom it is correctly addressed. If you are not the intended recipient of this transmission, you should not take any action in reliance on it. Further, this transmission may contain confidential design and other information owned by Buro Happold Ltd. You should not copy, distribute, use, offer for sale or hire such information or in any way infringe the design and intellectual property rights of Buro Happold Ltd. It is intended that communication by email from Buro Happold Ltd or its employees is limited to communications connected to the services provided by Buro Happold Ltd. Buro Happold Ltd accepts no liability for any communications not connected to the services it provides. Computer viruses may be transmitted or downloaded onto your computer system via email communication. It is the recipient's responsibility to take any action necessary to prevent computer viruses being transmitted in this way. Accordingly, Buro Happold Ltd disclaims all responsibility which arises directly or indirectly from such transmission of computer viruses. Buro Happold Ltd. Registered in England: 2049511. Registered Office: Camden Mill Lower Bristol Road Bath BA2 3DQ

From: Accessibuilt list [mailto:[log in to unmask]] On Behalf Of John Gregory
Sent: 14 December 2011 11:56
To: [log in to unmask]
Subject: Re: Usage of terms: tread length

Hi Rodney,

Alyson is correct in what she says, however, the technical term used for the tread (horizontal part of the stair/step) is the 'goer' and the virtical element the 'riser'.

John.

From: Accessibuilt list [mailto:[log in to unmask]] On Behalf Of Rodney Hunter
Sent: 14 December 2011 11:31
To: [log in to unmask]
Subject: Usage of terms: tread length

I would be grateful if UK colleagues would indicate what tread length means

Thanks in anticipation.

Rodney Hunter

Hunarch Consulting
Addr:      134 Johnston Street, Fitzroy, Vic., 3065, Australia
Tel:     +61 3 9005 5610 (Australia) +1 202 6575216 (USA) +852 8170 3210 (China)
Mob:   +61 411 982 189
URL:     http://www.hunarch.com.au
Email:    [log in to unmask]

This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information.
If you have received it in error, please notify the sender immediately and delete the original. Any other use of the email by you is prohibited.

---------------------

----------End of Message---------- Run by SURFACE for more information on research, consultancy and the distance taught MSc. in Accessibility and Inclusive Design programme visit: http://www.surface.salford.ac.uk Archives for the Accessibuilt discussion list are located at http://www.jiscmail.ac.uk/lists/accessibuilt.html