Reinforced glued laminated timber

Article Abstract:

A patented process for reinforcing glued laminated timber (glulam) with plastic fibers yields versatile structural timbers from low grade lumber at lesser costs. The compression-based technology is used for design methods. It can be used efficiently for the construction of bridges and other long-span applications, and as members that are subjected to bending loads. Manufacturing and design standards for reinforced glulam is being developed by the American Institute of Timber Construction. The ASTM E119 has tested and established the properties of the glulam both as single beams and roof assemblies.

Innovations, Product development, Laminated wood, Plastics, Timber

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Finding the right bond

Article Abstract:

A pedestrian bridge over the Flaz Creek in Pontresina, Switzerland, was constructed using a glass-fiber-reinforced polymer. The dual-span bridge exhibited different connection details, one span held together with bolts and the other fitted with adhesives. The advantages of the fiber-reinforced polymers are high strength, low weight and protection against erosion although they have less modulus of elasticity and resistance against ultraviolet rays. The bridge is periodically monitored for the evaluation of the materials' feasibility in structural engineering.

Public works, Switzerland, Design and construction, Composite materials, Footbridges

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Muscle made with carbon fiber

Article Abstract:

Structural Preservation Systems Inc. is one of the first in the construction industry to use carbon fiber-reinforced polymers (CFRP) to strengthen ageing concrete structures, such as parking decks and shipyard piers. CFRP systems, composed of inert materials, are lightweight and corrosion resistant, and can be wrapped over or around weakened concrete structures of any shape to form an external strengthener.

Materials, Concrete construction, Carbon fibers

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