Wood is widely used for many construction applications including concrete formwork. Wood is harvested from trees and is classified as hardwood and softwood. Hardwood comes from trees that have broad leaves such as oaks, maples, and basswood. Softwood comes from trees that have needlelike leaves such as pines, cedars, and firs. Softwoods are most commonly used in construction of form­work. It should be noted that the names ‘‘hardwood’’ and ‘‘soft­
wood’’ give no indication of the hardness or the softness of the wood.