Torque
Torque is a force that can cause an object to rotate about an axis creating torsion. In terms of buildings, wind, for example can apply forces of torque on buildings, which could lead to torsion. In the design wind of turbines torque is a key variable.
Torque is normally measured in Newton metres (Nm), or pound feet (lb-ft), which means a force in pounds acting on the end of a lever which is measured in feet. This should not be confused with foot pounds (ft-lb) which is used in horsepower to mean the amount of energy required to raise a 1lb weight by a distance of 1ft, in that case historically by a horse.
Whilst torque describes something that is capable of producing an angular acceleration or twist, torsion describes the twist that is formed in an object due to a torque. In everyday life opening a bottle, or turning a nut are examples of using torque, whilst it is also often a specification of engines and electrical motors, referring to the force to which the drive shaft is subject.
In the design and construction of wind turbines the torque load is calculated along with wind speed, angular velocity and inertia. Output power is calculated with torque, angular and rotational speed.
Torsion is the state of strain or twist that occurs in a material as a result of torque being applied. Torsion develops shear stresses and is equivalent to tension and compression but at right angles. This can be seen when wringing a wet towel – the water is squeezed out by torsion-induced compression.
Torque is expressed in:
- Newton metres (Nm), or pound feet (lb-ft)
- pound feet (lb-ft)
Torsion is expressed in:
[edit] Related articles on Designing Buildings
Featured articles and news
Future Homes Standard Essentials launched
Future Homes Hub launches new campaign to help the homebuilding sector prepare for the implementation of new building standards.
Building Safety recap February, 2026
Our regular run-down of key building safety related events of the month.
Planning reform: draft NPPF and industry responses.
Last chance to comment on proposed changes to the NPPF.
A Regency palace of colour and sensation. Book review.
Delayed, derailed and devalued
How the UK’s planning crisis is undermining British manufacturing.
How much does it cost to build a house?
A brief run down of key considerations from a London based practice.
The need for a National construction careers campaign
Highlighted by CIOB to cut unemployment, reduce skills gap and deliver on housing and infrastructure ambitions.
AI-Driven automation; reducing time, enhancing compliance
Sustainability; not just compliance but rethinking design, material selection, and the supply chains to support them.
Climate Resilience and Adaptation In the Built Environment
New CIOB Technical Information Sheet by Colin Booth, Professor of Smart and Sustainable Infrastructure.
Turning Enquiries into Profitable Construction Projects
Founder of Develop Coaching and author of Building Your Future; Greg Wilkes shares his insights.
IHBC Signpost: Poetry from concrete
Scotland’s fascinating historic concrete and brutalist architecture with the Engine Shed.
Demonstrating that apprenticeships work for business, people and Scotland’s economy.
Scottish parents prioritise construction and apprenticeships
CIOB data released for Scottish Apprenticeship Week shows construction as top potential career path.
From a Green to a White Paper and the proposal of a General Safety Requirement for construction products.
Creativity, conservation and craft at Barley Studio. Book review.
The challenge as PFI agreements come to an end
How construction deals with inherited assets built under long-term contracts.
Skills plan for engineering and building services
Comprehensive industry report highlights persistent skills challenges across the sector.
Choosing the right design team for a D&B Contract
An architect explains the nature and needs of working within this common procurement route.
Statement from the Interim Chief Construction Advisor
Thouria Istephan; Architect and inquiry panel member outlines ongoing work, priorities and next steps.
Comments
[edit] To make a comment about this article, or to suggest changes, click 'Add a comment' above. Separate your comments from any existing comments by inserting a horizontal line.