The arteries are the blood vessels that deliver oxygen-rich blood from the heart to the tissues of the body. Each artery is a muscular tube lined by smooth tissue and has three layers:1  The intima, the inner layer lined by a smooth tissue called endothelium.ll rights reserved. The arteries are the blood vessels that deliver oxygen-rich blood from the heart to the tissues of the body. Each artery is a muscular tube lined by smooth tissue and has three layers: 1  The intima, the inner layer lined by a smooth tissue called endothelium.
How much does an ASCBP steel roof weigh? Metal Roofing in general is a very strong, yet lightweight material compared to other roofing products. The 26 gauge metal roofing products weigh between 0.90 â 1.00 lbs.
Benefits of Metal Roofing. Metal Roofs Last Much Longer. A metal roof lasts up to 50 years or more, far longer than the average lifespan of non-metal roofs (17 years) and asphalt roofs (10 to 20 years). More Energy Efficient. A metal roof can save 25% in energy costs compared to an asphalt roof. Metal roofing panels reflect solar radiation far more efficiently than traditional roofing materials, which absorb and retain more heat. Because of this energy efficiency, your metal roof may qualify for tax incentives.