Static structures (e.g. – buildings) – With component having discrete prestressing means – Beam – girder – or truss construction
Patent
1990-09-05
1992-05-19
Chilcot, Jr., Richard E.
Static structures (e.g., buildings)
With component having discrete prestressing means
Beam, girder, or truss construction
52225, 52227, 52230, 52741, E04C 310
Patent
active
051136309
ABSTRACT:
The stone slab work support has its strength and resonant frequency increased by boring a long, small diameter hole along one or more longitudinal or transverse axes, inserting a tendon of high-strength steel in the hole such that threaded ends of the tendon protrude from the hole, and placing stress on the tendon through elongation and tightening threaded nuts engaging pressure washers to tension the tendon. The stone plate is thus compressed by the tension exerted by the fastener-tendon assembly and its resonant frequency increased above the frequency generated by equipment supported on the stone. Compressive stress is exerted on the stone plate, closing micro-cracks to increase the modulus of elasticity and increase the resonant frequency of the stone. The tendon may be inserted along an axis offset from the stone slab center of gravity by any desired eccentric value, enabling stress and deflection control of the slab for a wide variety of load cases.
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Dywidag Systems International, entitled "General" and Analysis, pp. 190-193.
Chilcot Jr. Richard E.
Rock of Ages Corporation
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