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T-beams are similar to double tees but can be used for span ranging from 30 feet (9.1 m) to 100 feet (30 m). Joists and planks are combination of using prestressed joists with prestressed planks. Keystone -shape joists can be used for up to 36-foot (11 m) spans and tee-shape joists can be used for up to 60-foot (18 m) span.
Tests will be run until water leaks from the bottom of the roof and thus the maximum load has been determined. [10] Products which have been tested successfully are – for instance by Braas Germany – being issued with a 30-year-guarantee for the material and an additional 30-year-guarantee for frost resistance. [11]
Felt paper is available in several grades, the most common being Type 1—commonly called 15-pound (15#) or No. 15 (#15)—and Type 2—commonly called 30-pound (30#) or No. 30 (#30). The weight designations originated with organic base felt weighing 15 or 30 pounds per 100 sq. ft. (6.8 kg or 14 kg per 9.3 m 2 ).
Minimum roof insulation level by climate – cool temperate; Alpine reducing heat loss is the main priority Example locations Minimum insulation level (total R-value (m 2 ⋅K/W)) Roof/ceiling* [26] Wall [26] Melbourne, Vic 4.1 2.8 Canberra, ACT 4.1 2.8 Hobart, Tas 4.1 2.8 Mt Gambier, SA 4.1 2.8 Ballarat, Vic 4.1 2.8 Thredbo, NSW 6.3 3.8
17.86m roll x 1.0mm (30 kg) Black 17.86m roll x 1.5mm (45 kg) Black and Grey [8] Butynol Roofing Usage Butynol is widely used in roofing applications, favored in New Zealand for flat roofs due to its durability and flexibility., [ 9 ] particularly for flat and low-slope roofs, due to its excellent properties that cater to the demanding ...
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This is a list of insulation materials used around the world. ... 30–57 Closed-cell polyurethane spray foam 2.54: 1 0.97–1.14: 5.5–6.5: 38–45 Phenolic spray foam
It can be used as internal insulation : between studs, joists or ceiling rafters, under timber floors to reduce sound transmittance, against masonry walls or externally : using a rain screen cladding or roofing, or directly plastered/rendered, [24] over timber rafters or studs or masonry structures as external insulation to reduce thermal ...