1. In a beam for a grid in a suspended ceiling, formed from a single layer of metal folded longitudinally into a cross section having
(a) a bulb at the top,
(b) a single-layered web extending downwardly from the bulb,
(c) a first and second flange at the bottom of the web, each of which extends horizontally on the opposite side of the web from the other flange, with the first flange formed of an upper and lower layer of metal, the upper layer of which extends from the bottom of the web, and the second flange formed of at least a single layer of metal extending from the lower layer of the first flange;
the improvement comprising
a balanced beam wherein the second flange is cantilevered from the bottom of the web by a binding, so that the resultant load of an equal vertical load on each of the first and second flanges of the beam passes directly through the vertical plane of the web.
2. The beam of claim 1, wherein the binding is formed by a seam of stitches.
3. The beam of claim 1, wherein the binding stiffens the web.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A composition consisting of:
at least one lubricant based on at least one polyol ester obtained from a polyol having a neopentyl backbone, or at least one polyvinyl ether;
a refrigerant consisting of 3,3,3-trifluoropropene and at least one hydrofluorocarbon selected from the group consisting of 1,1,1,2-tetrafluoroethane, 1,1-difluoromethane, and pentafluoroethane; and
optionally at least one of a compatibilizer, a surfactant, and a solubilizing agent.
2. A composition consisting of:
at least one lubricant based on at least one polyol ester or at least one polyvinyl ether;
a refrigerant consisting of 3,3,3-trifluoropropene and at least one of 2,3,3,3-tetrafluoropropene and trans-1,3,3,3-tetrafluoropropene; and
optionally at least one of a compatibilizer, a surfactant, and a solubilizing agent.
3. The composition as claimed in claim 2, wherein the lubricant is based on the at least one polyol ester, and wherein the at least one polyol ester is obtained from a polyol which has a neopentyl backbone.
4. The composition as claimed in claim 1, wherein the lubricant is based on the at least one polyol ester, and wherein the at least one polyol ester is obtained from linear or branched carboxylic acid having from 2 to 15 carbon atoms.
5. The composition as claimed in claim 1, wherein the lubricant is based on the at least one polyol ester, and wherein the at least one polyol ester represents between 10% and 50% by weight of the composition.
6. (canceled)
7. A composition consisting of:
at least one lubricant based on at least one polyol ester or at least one polyvinyl ether;
a refrigerant consisting of at least one hydrofluoropropene, wherein the at least one hydrofluoropropene includes 3,3,3-trifluoropropene; and
optionally at least one of a compatibilizer, a surfactant, and a solubilizing agent.
8. The composition as claimed in claim 7, wherein the at least one hydrofluoropropene further includes at least one of 2,3,3,3-tetrafluoropropene and trans-1,3,3,3-tetrafluoropropene.
9. The composition as claimed in claim 7, wherein the at least one hydrofluoropropene further includes 2,3,3,3-tetrafluoropropene and trans-1,3,3,3-tetrafluoropropene.
10. The composition as claimed in claim 2, wherein the at least one lubricant is based on the at least one polyol ester, and wherein the at least one polyol ester is obtained from linear or branched carboxylic acid having from 2 to 15 carbon atoms.
11. The composition as claimed in claim 2, wherein the at least one lubricant is based on the at least one polyol ester, and wherein the at least one polyol ester represents between 10% and 50% by weight of the composition.
12. The composition as claimed in claim 3, wherein the polyol which has the neopentyl backbone is selected from the group consisting of neopentyl glycol, trimethylol propane, and dipentaerythritol.
13. The composition as claimed in claim 2, wherein the lubricant is based on the at least one polyol ester, and wherein the at least one polyol ester is a pentaerythritol ester.
14. The composition as claimed in claim 2, wherein the at least one lubricant is based on at least one polyvinyl ether.
15. The composition as claimed in claim 7, wherein the at least one lubricant is based on the at least one polyol ester, and wherein the at least one polyol ester is obtained from linear or branched carboxylic acid having from 2 to 15 carbon atoms.
16. The composition as claimed in claim 7, wherein the at least one lubricant is based on the at least one polyol ester, and wherein the at least one polyol ester represents between 10% and 50% by weight of the composition.
17. The composition as claimed in claim 7, wherein the at least one lubricant is based on the at least one polyol ester, and wherein the at least one polyol ester is obtained from a polyol having a neopentyl backbone.
18. The composition as claimed in claim 17, wherein the polyol having the neopentyl backbone is selected from the group consisting of neopentyl glycol, trimethylol propane, pentaerythritol, and dipentaerythritol.
19. The composition as claimed in claim 7, wherein the at least one lubricant is based on at least one polyvinyl ether.
20. The composition as claimed in claim 1, wherein the at least one lubricant is based on the at least one polyol ester obtained from a polyol having a neopentyl backbone, wherein the polyol having the neopentyl backbone is selected from the group consisting of neopentyl glycol, trimethylol propane, and dipentaerythritol.
21. The composition as claimed in claim 1, wherein the lubricant is based on the at least one polyol ester, and wherein the at least one polyol ester is a pentaerythritol ester.