Industrial Domes

Since the mid-1960’s, Triodetic has been an internationally recognized leader in industrial applications to protect processing equipment, store materials, minimize dust problems and explosion risks.

We Offer:

  • Assistance in conceptual project development
  • Design method validated by full-scale testing
  • Long term integrity of thousands of structures
  • Manufacturing expertise, precision, efficiency
  • Construction techniques fully proven
  • In-house experience in all aspects
  • 40 years reputable performance

The Building Process

Dome Lift: Triodetic Domes can be assembled in many different ways. They can be erected while supported by crane as the dome is rotated (Smaller Domes 50’-100’). This option allows for fast assembly as the material is kept in one area. Once the section is installed, the dome is lifted for the next section to be installed.

Triodetic vaulted arches and domes have been used as treatment tank roofs and stockpile enclosures for many years. More recently geometry of application has allowed economical stockpile covers in very large spans exceeding 135 meters for use in both new and retrofit applications.

Barrel Vaults

The curvature of the elements in a structure offers more than just a visual appreciation. It allows the structural design stage, incorporating the theory of Arco. The use of steel and aluminum as the main material in the structure provides a large axial and flexural strength, in this way it is possible to achieve great free lights. In addition, arched structures can be created longitudinal great length to be expanded in cross section with relatively small strut. Also allows the design of building entrances shelters, curved walls including glass. Triodetic each vault designed specifically for the loads and geometry that are characteristic of each place and adapts to conditions that are available to support the structure. To the extent that a structure in cross section arcuate strut possesses decreased, larger horizontal forces are exerted on its supports, which can not always be contained by the junctions. The vaults can be widely used in remodeling applications to cover a patio or existing area. Triodetic design has the potential of steel or aluminum covered with minimal weight and fit any existing support location.

Its advanced design allows design and construction vaults using a single layer of elements which will keep a close dependence on the free light cover, place and charges that apply. The Vaults can be assembled without scaffolding, or assembled in sections and hoisted to its final position later, with or without lining attached.


Triodetic has designed & installed the support framing for the newest park attraction in scores of locations from hurricane zones in Florida, to Seismic zones in California, to heavy snow belts in Wisconsin, & internationally as far a-field as Australia’s Eastern Gold Coast. The Tornado slide shown is one of several innovative designs that won the 2005 International best new amusement park ride, eclipsing roller-coasters for the very first time. This 70 ft. high ride is proving to be an anchor attraction for park operators. It offers an endless variety of ride experience for rafters. Northern installations are supplied with a transparent dome enclosure to allow continuous use through the winter months.

Custom Geometries

Novel building shapes are possible with Space Frame designs by combining the basic geometries shown here. All of these can also be altered to suit your aesthetic preference or to align with adjacent buildings or support locations. Building design often develops around rectilinear spaces & the benefits of curved roofs & walls can be overlooked.

Modern space frame design methods allow us to expand the edges of domes (or any curved shape) to land on square, rectangular or any plan geometry. Advanced spaceframe manufacturing & construction techniques have made curved & complex shapes very competitive against more traditional linear roofs & walls.


Dome roofs have offered great visual appeal & clear column-free spans in buildings for centuries. Modern materials, design, manufacturing and installation methods allow almost unlimited dome shapes. Triodetic domes are designed as double curved shells which allow great structural & cost advantages in any span:rise ratio. Triodetic  Stockpile Storage Domes can be provided with elongation, asymmetry, door & conveyor openings, & can be designed to accommodate concentrated & unbalanced loadings in any locations around the world. Ore Dome roofs can be designed to suit square, rectangular or any plan shape. Componentized modular frame systems allow minimum material mass because the frame elements are optimized to match the stresses that apply in each discrete structure location. Triodetic design is based on extensive full scale testing & advanced analysis to prevent buckling.

Dome roofs are designed as a single layer or double layer structure depending on span & loadings. Applied loads are transferred axially through the dome shell, resulting in up to 60% reduction in roof mass versus linear beams that would be required or a pyramid or traditional A-frame roof. Horizontal forces that would normally be imposed by a conventional linear roof at it supports are effectively restrained in a dome by a tension ring around its base. Less roof mass & reduced horizontal forces result in smaller support/foundation requirements. Domes can be built in place where crane access is limited (with or without scaffolding) or can be pre-assembled in a staging area & then lifted into final position, (with or without cladding/glazing attached). Triodetic provides & installs dome cladding using a wide variety of materials & finishes to suit the service environment & visual requirements.

Free Forms & Shells

Triodetic can design & build the structure & cladding or glazing for ANY imaginable shape. Curvature often allows more efficient structural behaviour that results in economies in the frame mass & foundations.

This technology creates affordable uniqueness for entrance canopies, luxury homes, museums, theme parks & any building where visual impact is desired.


HYPARS are structural shapes curved in two directions as Hyperbolic Parabola. They form part of a family of single layer shell structures (or double curved lattices) that cover long spans with a light-weight structural network, acting in tension or compression. The closely spaced tubes directly support cladding without the need for intermediate or secondary trusses. This results in a visually appealing roof profile, a very shallow roof depth & lower cost due to reduced material mass. Hypar roofs can be designed & built to any elevation or plan geometry and multiple structures can be combined to achieve a ribbon-like appearance. The edges of each Hypar are restrained & foundations are designed to resist thrust & overturning movement under all service conditions. Hypars also provide the aesthetics of tensile fabric structures, but with the added structural integrity needed in regions subject to hurricane or snow loads.


Triodetic pyramids are three or four space frame panels which are interconnected at the ridge lines. This allows for unlimited configuration in both plan and elevation. Pyramids can be column supported or supported along the full perimeter. Covering can be glazing or metal panels.

The botanical enclosure pictured bellow (Right), is part of Sydney’s suite of visually striking architectural features including the Centrepoint Tower, Harbour Bridge & the Opera House. Galvanized steel tube was selected to provide durability in the warm, humid interior created to replicate tropical climates favorable to the plantings. The exterior glazing is supported by purlins attached to the Triodetic frame & sealed using the batten system. The original gardens were established in 1816 and are the oldest scientific institution in Australia.

Space Frames

Space Frame Applications: Malls, Transport Terminals, Schools, Pools, Arenas, Entertainment, Hospitals, Hotels, Corporate & Commercial Buildings, Convention Centers

  • Pre-assembly allows project acceleration
  • Pre-finished to avoid site painting & inspection
  • All service lines can run through frame
  • Simple modification or dis-assembly for re-use
  • Space Frame can be a feature without ceiling
  • Accommodates concentrated loads
  • Suit irregular support or plan geometry
  • Variable depth for roof drainage is built-in
  • Minimum structure weight
  • Long clear spans & cantilevers


Spheres are a visually attractive, structurally efficient & an often found application in Theme Parks, Theatres, Religious Buildings, Malls, Building features & Signage. Various geometrical arrangements can be developed with a triangle as the basic structural element. Geodesic domes are arranged so that every line of members around the sphere divide it in half & all member and joints are identical.

Modern technologies allow all shaped structures to be developed very economically with differing members and joints. Lamella geometry is often considered more aesthetically pleasing & is more practical to build. Schwedler geometry is sometimes preferred for small glazed structures. Structural design assumes loads are transferred axially through the shell which results in very efficient design-lighter structural members & less load on foundations. The ability to quickly construct Triodetic spheres in pre-assemblies also reduces cost and time.


Toroids are appearing in structural applications due to their aesthetic & structural benefits. Examples include the Dubai & Osaka airport terminals, and London Museum. However the structural efficiencies of this shape are also being applied by Triodetic in long-span ORE STOCKPILE ENCLOSURES for mining companies. Toroid shapes are simply described as a double curved surface that resembles part of a tyre or inner-tube.

The toroid shape has curvature in two planes & therefore can be designed as a shell. Space Frame designs This results in less structure mass than linear designs and by controlling the angle of the structure wall at its base, footing reactions can be minimized. Overall structure curvature & member sizes must be designed to resist buckling & to restrain surface discontinuities, however these structures can be very economical & fast to construct.