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Difference between astm d-226 and d-4869?
Different types of asphalt felt have different weights. Here are some data on the weight of felt types per 100 square feet: Weight per 100 square feet: Unrated (non-ASTM) #15 felt: 7.6 to 8.8 lbs. ASTM D 4869 #15 felt: 8.0 to 9.7 lbs. ASTM D 226 #15 (Type 1): 11.5 to 12. 5 lbs. Unrated (non-ASTM) #30 felt: 15.7 to 19.9 lbs. ASTM D 226 #30 (Type 2) felt: 26.4 to 27.3 lbs. Other relevant information from the article: "Asphalt felt, which has been around for over a hundred years, was originally a true cloth felt. "A long time ago, they used rag felt, which was cotton," says Dodie Webster, technical services manager at Tamko Roofing in Joplin, Mo., a manufacturer of asphalt felt. "But we can't get cotton rags any more." Since present-day asphalt felt is a paper product, the term "felt" is somewhat of a misnomer. "Unsaturated felt is basically composed of recycled corrugated papers mixed with sawdust," Webster says. Over the years, asphalt felt has also gotten lighter. "In the old days, it used to weigh 15 pounds per 100 square feet, but not anymore," says Allen Snyder, product engineer at CertainTeed, a manufacturer of asphalt felt. The main reason manufacturers make light-weight felts is because they're cheaper. "The whole issue comes down to price," says Ed Todd, technical manager at Atlas Roofing, an asphalt felt manufacturer in Atlanta. "This is a price-sensitive product," Todd says. Manufacturers now call their product "number 15" felt instead of 15-pound felt, and it weighs anywhere from 7 to 14 pounds per square. "ASTM has established two standards for asphalt felt. The less stringent standard is ASTM D 4869, which requires Type 1 (#15) felt to weigh at least 8 pounds per 100 square feet. The more rigorous standard, ASTM D 226, requires a minimum weight of 11.5 pounds per square. Most lumberyards stock only light-weight asphalt felt with no ASTM rating. "We sell a lot of the lightweight felts, the non-ASTM #15," says Webster. "It is probably our biggest seller." This type of #15 felt sometimes weighs only 7.6 pounds per square. There are a few regions where ASTM-rated felt is widely available, however, because of code requirements. "The most stringent felt market in the U.S. is Florida," says Ed Todd, of Atlas Roofing. "In Florida, at a minimum you must have 'ASTM D 4869' on the wrappers." "Asphalt felt is also available in a heavier version, commonly called 30-pound felt. This #30 felt is available in both the unrated grades and the ASTM-rated felts. ASTM standards refer to #30 felt as Type 2. The lightest unrated #30 asphalt felt is still heavier than the heaviest ASTM-rated #15 felt, making it a logical choice for concerned builders. "Asphalt felt has a permeance of only 5 perms when dry, but a much higher rating of 60 perms when wet. Fans of felt note one of its advantages over housewrap: If water gets behind felt - either due to a flashing leak or condensation from solar-driven moisture - the felt can soak up the liquid water and gradually dry to the exterior."
What is tensile strength mean?
It is the strength in pounds per square inch of a material at which it will be pulled apart.
What is the R-value of Normal Weight Concrete per inch of material?
Normal Weight Concrete at 150 pcf has an R value of 1.22 per inch thickness
What does IPM stand for?
There are probably other context, but one common meaning is "Inches Per Minute".
Which material has the highest tensile strength spider silk copper glass or plastic?
spider silk's tensile strength (per unit of density) is about ten times that of steel cable.
What is the weight of one inch clean crushed limestone per cubic foot?
I just ran the ASTM (D 4253) Relative Density on this material and got 94.1 pcf.
How do you calibrate profile projector?
what is the standard procedure as per ASTM or ISO for the calibration of profile projector
Can stainless steel piping be seamless?
Yes! Per ASTM A 312 in 304/304L and 316/316L.
What is the modulus of rupture formula?
Per ASTM C78, the flexural strength of concrete (or the Modulus of Rupture) can be derived from the following equation:fc' = R2 / 100where:fc' = compressive strength (psi)R= Modulus of Rupture (psi)
What is the raw material as per is 2062?
As per the 2062, the raw material is the steel that is used for the general structure purpose.
I am searching for an accredited test lab to test IR thermometers per the ASTM E1965 standard.?
There is a list of such labs here http://www.intersocietal.org/icavl/laboratories/lablist/Maryland_to_Massachusetts.htm
What is the density of copper in grams per square centimeter?
Density is measured as mass per unit volume: not mass per unit area. Unless the material is of uniform thickness.Density is measured as mass per unit volume: not mass per unit area. Unless the material is of uniform thickness.Density is measured as mass per unit volume: not mass per unit area. Unless the material is of uniform thickness.Density is measured as mass per unit volume: not mass per unit area. Unless the material is of uniform thickness.
How much material by weight falls to earth from space per day on average?
average of 40 tons per day of extraterrestrial material falls to the Earth
What is the meaning of average cover?
This question doesn't specifically define which meaning of average cover you are looking for. The meaning of average per cover in restaurants is the total number of sales divided by the cover per sale.
How much would it cost fo make a sari using 3.58 meters of material if the material costs 6.98 per meter?
If a sari uses 3.58 meters of material and the material costs 6.98 per meter you calculate the cost: 3.58 meters x 6.98 per meter = 24.9884 24.9884 or if rounded to whole pennies 24.99
Cost per capita?
WHAT IS THE MEANING OF COST PER CAPITA
What is the cost per s?
Cost per square foot. Either material or labor or both.
