These high performance structural materials focus on function but their sailing heritage hints at more than a passing care for design aesthetics. Our CPD Live session takes a closer look.
October 28th, 2022
In the exacting field of lightweight architecture, the use of tensile mesh is a relatively new endeavour. Originally developed in Germany in the 1990s, tensile mesh uses stainless steel cables to form a mesh of diamond-shaped apertures and thereby hold material in tension.
As Rowan Murray of Ronstan explains in CPD Live, tensile mesh has developed out of a focus on high strength, efficiency, lightweight material performance and corrosive resistance. “As architects, designers and engineers, we are looking to apply those same attributes to how we carry load in architecture,” he notes.
Given the benefits of structural performance in using such lightweight material, considerations of function and engineering take precedence in the design process. For example, strength and structural load requirements determine the size of apertures in the mesh and the diameter of the cable.
Other functional considerations include safety with regard to the prevention of climbing and cost factors relating to complexity. As Dr Paul Joseph explains in relation to the geometry of the mesh surface form, it can be planar or curved – with ramifications in terms of the complexity of design. While planar mesh forms are cheaper and simpler to design, they do not have the inherent strength of a curved surface held in tension.
All in all, tensile mesh seems to make a truism of the old architectural dictum – form follows function. However, as with all design, things are not quite so simple. Tensile mesh and cables are intriguing materials because, as Peter Lim of Tensys says, “all the elements are seen” – and yet the structure as a whole is transparent, or at least porous.
This amounts to a realisation, for Lim, that “architects need to understand how a structure works and engineers need to understand aesthetics.” The collaborative nature of the work brings about a “blending of the architecture and the structural design to come up with the right balance.” With this balance of form and function, the product becomes “a structure that you’re proud to see both structurally and architecturally.”
As material that works by being held in tension, tensile mesh must also be designed in relation to the boundary structures to which it is attached. This structure is usually a cable, rod or tube whose size and shape provide further openings for architectural and aesthetic considerations.
Rowan Murray emphasises the lineage of tensile architecture back to sailing. It is no coincidence that this commonality exists, sailing being an activity that cannot help but blur the line between aesthetics and the pushing of material performance boundaries.
Function, form, performance, visual effect and efficiency come together in tensile mesh to create new possibilities in collaborative design between architects and engineers. Murray says, “I’m looking forward to seeing what concepts architects and designers bring to us. There are some wonderful opportunities for this product because it has that unique quality of aesthetics married with efficiency and structural performance.”
Courtesy of Ronstan
CPD Live Tensile Mesh Barriers and Facades: Unpacking the Key Design Considerations, presented by Ronstan, was facilitated by Jan Henderson (Editor and INDE.Awards Programme Director, Indesign) and featured panellists Rowan Murray (Ronstan), Dr Paul Joseph (Ronstan) and Peter Lim (Tensys).
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