03 Jul Laminated Veneer Lumber (LVL) Properties
Durability will be in part based on the species used for LVL. Although LVL is manufactured using a fully weatherproof glue, it is not recommended for use in permanent exposure to weather. If ongoing exposure is planned, products can be specially manufactured with a preservative treatment for the particular application. Members should also be painted or stained, with the coating maintained as required. Particular attention should be paid to sealing of end grain and in joints.
LVL may be subject to decay if there is a high moisture content or used in an unventilated area. If used for in-ground applications, LVL should be treated to protect against decay and termites.
LVL sizes will vary between manufacturers. Manufactured sheets or billets are usually 1200 m and 2400 m wide and in standard thicknesses of 35, 36, 39, 45 and 63 mm.
Lengths of up to 12 m are available from some manufacturers.
Beam depths are available of 1200 mm deep.
There are no generic grades for LVL. Each LVL or LSL manufacturer has designed and tested their products in accordance with AS/NZS 4063 Timber – Stress-graded – In-grade strength and stiffness evaluation to determine their design properties. This engineering data is available from the relevant manufacturer, together with span tables for common applications.
While there are no generic grades for LVL, it is generally not used for appearance-based applications. One reason is that gluelines are often visible. LVL can be sanded and painted if required.
LVL veneer grades are as per manufacturer’s specifications.