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Demsey Timber Engineering
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Dempsey Timber Engineering Ltd : Trusses & Roof Trusses Ireland; Timber frame; Timberframe; Trusses; Roof Truss; Roof trusses; Close panel; Closed panel; Closepanel; Air tightness; Airtightness; Semi Close panel
DTE – One of Irelands leading Roof Truss Manufacturers

Trussed Rafters

Trussed Rafters or Roof Trusses are specified for the majority of roofs in Ireland today. The trussed rafter is an individually designed component, engineered to provide a structural frame for the support of roof or similar structures and have proved to be an efficient, safe and economical method for supporting roofs since their introduction in 1964. Trussed Rafters must only be manufactured by specialized timber engineering companies.
DTE are experienced roof designers and manufacturers and are therefore in an ideal position to assist in achieving affordable solutions throughout the building industry.

DTE use state-of-the-art ‘Wolf Systems’ software which provide the most advanced timber roof design, manufacturing and management software available. The whole roof is designed and specified using this state-of-the-art computer aided technology. Trusses are designed in accordance with the current Code of Practice, which is IS193:1986 and the relevant Building Regulations.

Putting our Customers First
DTE are one of Irelands leading Roof Truss manufacturers and are approved by the National Standards Authority of Ireland. Our position in the market place ensures we can offer our customers a ‘quality product’ along with valuable ‘consumer confidence’.

Our trussed rafters are pre-fabricated from high quality, stress graded timbers and joined together with steel nail-plate fasteners, it is a flexible, practical and fully engineered solution to roofing requirements. It is economical, as there can be up to 40% less timber used than in a traditionally formed roof and competitively priced, can reduce labour cost on site due to the amount of pre-fabrication.

Technical data

Standard trusses can be designed up to max span of 11 metres in 35mm thick timber, and 16 metres for 47mm thick timber.

It is more economical to standardize the range of pitches between 15 & 40 degrees, however, trusses may be supplied outside this range. Care should be taken when specifying because deflection problems may arise with for example very shallow pitches.

Trusses are usually spaced at 600mm, but can also be positioned at 400mm to support heavier loads.

DTE uses timber which is kiln dried and stress graded, which complies with current building regulations.

Trusses may be treated with one of the new waterborne solutions, or with non-corrosive spirit based organic solvents.
(Copper Chrome Arsenate and similar treatments, are not recommended).


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Irish Timber Frame Association