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INVESTIGATION

2.17 TRELLIS TRUSS SYSTEM

What kind of truss is capable of both spanning the necessary distance and satisfying the trellis’s design vision?

NO DIAGONAL

The spanning structure must be able to span 50m, support the trellis, wisteria, and support structure. It is also important that vertical elements are free to curve and maintain the visual impact of the arching trellis.

SPAN 50m

SELECTION CRITERIA

HIGH STRENGTH

TRELLIS ELEVATIONS MATERIAL EFFICIENCY

CHOOSING A TRUSS SYSTEM

1

2

WARREN TRUSS In this type of truss, diagonal members are alternatively in tension and in compression. The Warren truss has equal length compression and tension web members. Warren trusses are commonly used in long spans.

6

3

PRATT TRUSS In a Pratt truss diagonal members are in tension for gravity loads. This type of truss is used where gravity loads are predominant

4 7

5

8

TRELLIS ELEVATIONS VIERENDEEL TRUSS Vierendeel trusses are rigidly-jointed trusses having only vertical members between the top and bottom chords. The chords are normally parallel or near parallel. Elements in Vierendeel trusses are subjected to bending, axial force and shear, unlike conventional trusses with diagonal web members where the members are primarily designed for axial loads. They are usually more expensive than conventional trusses and their use limited to instances where diagonal web members are either obtrusive or undesirable. Vertical members near the supports are subject to the highest moments and therefore require larger sections to be used.

WIDE SUPPORT STRUCTURE TO RESIST SHEAR BENDING AT ENDS

REMOVAL OF WIDE SPANS WITH NO VERTICAL CONNECTION

VERTICAL CONNECTIONS AT LARGE ARCH

VIERENDEEL TRUSS Identifying structural truss elements

TRELLIS SYSTEM TRELLIS CONNECTION DETAIL

CAST FIBERGLASS REINFORCED PLANTER

CAST RECTANGULAR HSS CONNECTION

400mm STEEL UPE CHANNEL

M30mm BOLTS

CAST RECTANGULAR HSS CONNECTION

TRELLIS RADIANT SYSTEM JOINT

STEEL HSS PLANTER STRUCTURE

CONCLUSION SteelConstruction: The Free Encyclopedia For Uk Steel Construction Information. http://www.steelconstruction. info/Trusses. Accessed 10 May 2017

THE GRAND TOUR OF EUtopia

The vierendeel truss is able to span the distance between the two breakwaters with out compromising the trellis design language due to the absence of diagonal members.

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The Grand Tour of EUtopia. Design Realisation  

Relocating across memory to critique the contemporary European Union. The Grand Tour of EUtopia is a modern pilgrimage critiquing the role o...

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