In 2012, doctors working in primary care had a median compensation of $220,942 while those working in a specialty had a median of $396,233, according to the Bureau of Labor Statistics. Choosing between becoming a doctor or a physician assistant may likely require students to weigh more than just their potential salary.
Ordinary Maintenance. On average, a deck made from pressure-treated pine will last 15 to 20 years before succumbing to the accumulated stress of direct sunlight, rain, salty ocean breezes, insect infestation and repeated cycles of thermal expansion and contraction.ressure-treated pine remains the most commonly used decking material, reports the Popular Mechanics website, but plastic composite decking planks have earned a growing percentage of the marketplace -- in part because homeowners believe these pricey alternatives might outlast genuine wood.
How Long Materials Last The industry wide estimates of how long different roofing materials last are given below: Asphalt Roofing shingles last 15 to 20 years Concrete or clay tiles typically last at least 20 years Wood shingles are good for 10 to 40 years Metal Roofing shingles or panels last 15 to 40 years Slate lasts for 30 to 100 years Now, you may be wondering why there is such a huge spread in how long different classes of material last.