specifications. If your vehicle was originally charged with R12 refrigerant, for example, the oil type specified, 'mineral', will not apply. Additionally, General Motors issues Bulletin # 02-01-39-004B replacing PAG 150 oil with a lower viscocity oil.
The term square in reference to roofing materials refers to 100 square feet of roof area. One square of slate is the amount of slate that it takes to cover 100 square feet of roof area. A 10 foot x 10 foot section of roof would equal one square. So would a 4 foot x 25 foot section. Ditto for a 5 foot x 20 foot.
Square. A measurement of roof area that equals 100 square feet (an area 10 feet by 10 feet). Slope. A roofâs slope is the number of inches it rises for every 12 inches of horizontal ârun.â A roof with a â4-in-12 slopeâ rises 4 inches for every 12 inches of horizontal run.The same roof has a 4/12âor 1/3âpitch.t has a 1/4 pitch. Roof slope is expressed as the ratio of a roofâs rise (vertical distance) to each foot of run (horizontal distance). A â4-in-12 pitchâ means the roof rises 4 inches for every 12 inches of horizontal distance.