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2. Laminated veneer lumber - Wikipedia

   en.wikipedia.org/wiki/Laminated_veneer_lumber

   Rotten LVL joists from the Berkeley balcony collapse. Because it is specifically sized to be compatible with I-joist floor framing, residential builders and building designers like the combination of I-joist and LVL floor and roof assemblies. LVL is considered to be a highly reliable building material that provides many of the same attributes ...

3. Glued laminated timber - Wikipedia

   en.wikipedia.org/wiki/Glued_laminated_timber

   Glulam brace with plates used for connections Glulam frame of a roof structure. Glued laminated timber, commonly referred to as glulam, is a type of structural engineered wood product constituted by layers of dimensional lumber bonded together with durable, moisture-resistant structural adhesives so that all of the grain runs parallel to the longitudinal axis.

4. I-joist - Wikipedia

   en.wikipedia.org/wiki/I-joist

   Invented in 1969, the I-joist is an engineered wood product that has great strength in relation to its size and weight. The biggest notable difference from dimensional lumber is that the I-joist carries heavy loads with less lumber than a dimensional solid wood joist. [1] As of 2005, approximately 50% of all wood light framed floors used I-joists.

5. Tie (engineering) - Wikipedia

   en.wikipedia.org/wiki/Tie_(engineering)

   Joist hangers are used to prevent floor joists, which is what supports the flooring systems in residential homes and buildings built using lumber, from dropping and twisting thus creating an uneven walking surface. This is known as floor sagging.

6. Lumber - Wikipedia

   en.wikipedia.org/wiki/Lumber

   This section provides requirements for non-residential construction applications, such as wood used above ground (e.g., for framing, decks, stairs, etc.), as well as other applications. There are four recommended methods to protect wood-frame structures against durability hazards and thus provide maximum service life for the building.

7. I-beam - Wikipedia

   en.wikipedia.org/wiki/I-beam

   I-joists, I-beams engineered from wood with fiberboard or laminated veneer lumber, or both, are also becoming increasingly popular in construction, especially residential, as they are both lighter and less prone to warping than solid wooden joists. However, there has been some concern as to their rapid loss of strength in a fire if unprotected.