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lumber-products-can-be-modeled-best-using-the-model-of-an Lumber is a generic term that applies to various lengths of wood used as construction materials. Pieces of lumber are cut lengthwise from the trunks of trees and are characterized by having generally rectangular or square cross sections, as opposed to poles or pilings, which have round cross sections. The use of wood as a construction material predates written history.  Lumber produced in early sawmills had varying dimensions depending on the customer's specific order or the mill's standard practice. Today, lumber pieces used in construction have standard dimensions and are divided into three categories, depending on the thickness of the piece. Lumber with nominal thicknesses of less than 2 in (5 cm) are classified as boards. The Lumber Model Problem. Add to Favorites. 3 teachers like this lesson.  Well, diameter is a linear measure (feet), but the amount of lumber is a cubic measure (board-feet, or 1ft. x 1ft. x 1in.), so L would reasonably be modeled with as a cubic function of d. Ok, so in general L(d) = aL^3 + bL^2 + cL + d. In order to turn this into a usable model, you'll need to find appropriate values for the coefficients a, b, c, and d, and to do that you'll need some data on the actual relationship between diameter and lumber. Now, hand out the Lumber Problem and let students begin! The Lumber www.- The Lumber www.- Developing a Model. 20 minutes. Since LVL production started as an extension or variation of plywood production, most LVL is hot pressed in multiopening presses, where LVL is limited in length. Modern plants for the production of structural LVL tend to employ a continuous veneer assembly and hot pressing, in which the joints are well distributed. This makes LVL production less labor intensive than the production of plywood or glued laminated timber. A tractor-tread press with electrical heating units is employed to produce high-tensile-strength LVL (Micro-Lam). Another type of tractor-tread press uses radio frequency heating.
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