Prestressed vertically laminated beam of wood
Abstract
Abstract DURING THE MANUFACTURE OF BEAMS, VERTICAL LAMINATIONS OF WOOD ARE HELD SECURELY IN AN OPPOSITE BENDING MOMENT TO THAT ANTICIPATED AFTER THEIR ERECTION IN A BUILDING. WHILE SO HELD, THEY ARE RELATIVELY MOVED TO RESPECTIVE SIDES OF A VERTICAL MEAL LAMINATION OR LAMINATIONS, WHICH IN TURN ARE BEING OPTIONALLY LONGITUDINALLY PULLED AT THE BOTTOM OF EACH OF THEIR RESPECTIVE ENDS. THEN ALL VERTICAL LAMINATIONS ARE MOVED TOGETHER UNDER COMPRESSIVE FORCES AND SECURED WITH FASTENERS. OPTIONALLY, THE FASTENERS MAY BE FORMED FROM AND REMAIN A PART OF THE METAL LAMINATION OR LAMINATIONS. AFTER SECUREMENT BY FASTENERS AND THEN UPON RELEASE FROM BENDING, PULLING AND COMPRESSIVE FORCES, THE DERIVED PRESTRESSED WOOD AND METAL BEAM IS READY FOR INCLUSION IN AN OVERALL STRUCTURE.
Inventors
- 👤 Skuli Walter Lindal
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |