Mascia, "Mechanical performance of glued-laminated timber
beams symmetrically reinforced with steel bars," Composite Structures, vol.
Acetaldehyde emissions from wood-based materials, particularly glued-laminated timber bonded by phenol-resorcinol-formaldehyde (PRF) adhesives, were found in indoor air, sometimes in extraordinary amounts (Matsuda et al.
A single glued-laminated timber was manufactured for each test condition, and the test specimens were produced from five laminas.
Two glued-laminated timber samples per condition were manufactured.
Most notable have been the development and refinement of wood preservatives and the use of structural glued-laminated timber (glulam), stress-laminating, and structural composite lumber.
Through engineered wood products, such as glued-laminated timber and structural composite lumber, many of these variables are substantially reduced.
"Glued-Laminated Timber for Bridge Construction," Wood Design Focus, Vol.
Performance of glued-laminated timber
panels for bridge-deck replacement.
Four groups of 5-lamination glued-laminated timber
beams were designed.
TECO has been approved to certify production of general use and structural plywood, structural panels, (i.e., OSB), laminated veneer lumber (LVL) and glued-laminated timber
(i.e., glulam) including low formaldehyde emission (LFE) products for these items.
There are three use categories for softwood lumber: 1) yard lumber, which is primarily dependent on appearance; the higher grades are used for trim, siding, flooring, and paneling and the lower grades are used for shelving, sub-flooring, and concrete forms; 2) structural lumber, which is evaluated for its relative strength and stiffness (e.g., 2 by 4's, joists, I-beams, timbers, glued-laminated timber); and 3) factory and shop lumber, which is usually cut into smaller pieces for manufacturing into secondary products.
Again, results indicated that small-diameter, suppressed-growth Douglas-fir can produce some high-quality lumber that offers significant opportunities in products such as trusses, glued-laminated timbers, and I-beams.