Metal web joists
Engineered wood products and an introduction to timber structural systems, published by the Structural Timber Association, defines metal web joists as “shallow parallel chord trusses manufactured using similar techniques to that used for trussed rafters comprising a member with flanges (or chords) usually made from softwood and with metal or timber strutting to form the webs'.
Metal web joists are also referred to as open web joists.
The Code of Practice for Engineered Wood Products, published by the Engineered Wood Products Committee of the UK Timber Frame Association, states that ‘open web joists are structural members manufactured with chords made from softwood or laminated veneer lumber (LVL) and with metal or timber strutting to form the webs. The chords are connected to each other by a system of triangulation, which may be provided by thin gauge steel webs incorporating integral nail-plated zones’.
Metal web joists are primarily used for floor and roof joists. They are generally preferred over thin webbed joists (or I-joists) for these applications, because this type of joist tends to provide space for services as well as a structural zone.
[edit] Related articles on Designing Buildings
- Joist.
- Rolled steel joist (RSJ).
- Thin webbed joists.
- Timber post and beam construction.
- Timber engineered structural frames.
- Types of beam.
- Types of flooring.
[edit] External resources
- Engineered Wood Products Committee, UK Timber Frame Association, The Code of Practice for Engineered Wood Products.
- Structural Timber Association, Engineered wood products and an introduction to timber structural systems.
Featured articles and news
Top 50 firms awarded 52bn of projects in the last year
New engineering data shows.
Enhancing construction site reporting efficiency
Through digitisation and the digital revolution.
Noise in the built environment
BSRIA guide TG 20/2021.
17,000 people suffer conditions as a result of exposure to excessive noise at work.
Turning down the noise: Auditory health
A pervasive risk with far-reaching consequences.
UK Construction Week, London is here !
Debuting major international pavilions and much more.
Getting the most out of heat pumps and heating
How heat pumps work and how they work best.
Plumbing and heating for successful retrofit and renovation
Low temperature underfloor systems and heat pumps.
Cost-of-living crisis and home improvement plans
Starting on the right footing and top tips for projects.
Delays on construction projects
Types, mitigation and the acceleration of works.
From Chaucer to Fawlty Towers.
Electrotechnical excellence, now open for entries.
Net zero electricity grids BSRIA guide NZG 5/2024
Outlining the changes needed to transition to net zero.
CIOB Global Student Challenge 2024
Universitas Indonesia wins for second year running.
ECA 2024 Apprentice of the Year Award
Entries open for submission until May 31.