Early military planes utilized Douglas fir within their construction – biplanes, and tri-planes of WW I. Beams are Minimize from native trees which include pine, spruce and white and purple fir and range between 4x4 to 16x16 and in lengths from eight - 32". Beams are used for ceiling https://fernandodbyvp.blogerus.com/50770700/not-known-details-about-wood-shavings-for-sale