TRELLIS

TRELLIS

Post 476 by Gautam Shah

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The word Trellis derives from trilicius, (tri- + licium = thread), referring it to a woven entity ‘with three threads. A trellis in old French as treliz simply refers to a fabric of open texture. Basket or matt weave is interpreted as construction where two or more threads of grass, weeds, vines, twigs, bamboo slivers or green cane slip are used in both the warp and filling direction. And so Trellis may have meant an open-mat like weave. These may have been used as screen cover over the gaps or openings like doors and windows, to prevent entry of stray animals rodents, flies, and mosquitoes, to reduce the pressure of heavy winds, or, control the brightness.

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Théâtre de la Reine Galerie de Treillage

Le Pont de l’ Europe by Gustave Caillebotte

Matts have Three forms, soft ones have no edge reinforcement and so can be folded in either of the direction. Matts with reinforcement at the ends (usually warp ends) can be rolled up after hanging, whereas with stiff support on all four edges, it forms a panel. Trellises are referred to “as panels, made from interwoven wood pieces”.

Cheval de frise, a medieval latticed defense for anti-cavalry measure with many projecting long iron or wooden spikes or spears.

Treillage is French word (Middle French, from treille or vine arbor) for latticework used for supporting vines and green foliage. Lattices have been used in agriculture for supporting plants, and protecting them in inclement weather. During Renaissance period lattices were key elements of garden scapes. These were used for gates, fences, tree guards and as support structures for pots and vases. For garden scapes metal trellises replaced the wood trellises, post-industrial age. A metal structure gets very hot and fast, burning out the climbers or plants, so wood has continued to be a compulsory requirement.

Garden Lattice

A trellis supporting speakers at Jay Pritzker Pavilion

Lattices are architectural as well as interior space elements. These are of essentially of Five types.

1 Protective lattices against height related hazards, within openings, spiked one against unauthorized entry, and as spark arresters in fire places.

Latticed walls of Salim Chisti Tomb India

2 Space dividing elements such as fences, guard rails, reja (screens to enclose a chapel or a tomb in a church), partitions, and as a translucent barrier. Indian balconies, Zarokha and Mid-East countries traditional window form, Mashrabiya, use grills to occlude vision from outside and as a sun shading device.

Iron grating over window Venice

3 Roofing elements are called Pergola or roof screens. Indian urban houses in crowded localities have central open cut spaces called Chowk, and these are covered with a lattice structure at every floor level. These are used for seating, sleeping, craft work, drying clothes, etc. besides providing lighting and ventilation to every floor. Pergolas are used to control the illumination and cutoff sunlight during specific daily and seasonal schedules.

UT Dallas campus allée

Puerto Rico Convention Center San Juan

4 Flooring elements of lattices are used in walkways and catwalks of warehouses, performance stages. Floor lattices in doors screen dust off the shoes soles. Floor lattices do not allow cattle to enter or leave an estate.

5 Structural Lattices are mainly used for reducing the mass (dead weight). Girders are castrated to increase the depth for the same mass. Brides, towers, pylons, Vierendeel Girders,

Vierendeel Girders

Trestles are useful as approaches to bridges over marshes and shallows

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  1. Pingback: BLOGS LINKS about PERCEPTION | Interior Design Assist

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