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weight

In science and engineering, the weight of an object is the force acting on the object due to gravity.Some standard textbooks define weight as a vector quantity, the gravitational force acting on the object. Others define weight as a scalar quantity, the magnitude of the gravitational force. Yet others define it as the magnitude of the reaction force exerted on a body by mechanisms that counteract the effects of gravity: the weight is the quantity that is measured by, for example, a spring scale. Thus, in a state of free fall, the weight would be zero. In this sense of weight, terrestrial objects can be weightless: ignoring air resistance, the famous apple falling from the tree, on its way to meet the ground near Isaac Newton, would be weightless.
The unit of measurement for weight is that of force, which in the International System of Units (SI) is the newton. For example, an object with a mass of one kilogram has a weight of about 9.8 newtons on the surface of the Earth, and about one-sixth as much on the Moon. Although weight and mass are scientifically distinct quantities, the terms are often confused with each other in everyday use (i.e. comparing and converting force weight in pounds to mass in kilograms and vice versa).Further complications in elucidating the various concepts of weight have to do with the theory of relativity according to which gravity is modeled as a consequence of the curvature of spacetime. In the teaching community, a considerable debate has existed for over half a century on how to define weight for their students. The current situation is that a multiple set of concepts co-exist and find use in their various contexts.

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  1. G

    Questioning the real weight load of plaster

    There are many blogs out there showing a table of maximum weight certain substrate - for example: https://www.toppstiles.co.uk/knowledge-base/tiling-background-weight-limits ...and they all say 20kg for gypsum-based plaster - so I'll assume we are talking about products such as multinish in...
  2. S

    Weight of tiles 8mm + 10kg mirror OK On PB?

    I am in the process of refurbishing my ensuite bathroom and on one wall I will be taking the tiles to the ceiling and also adding an 800 mm² mirror that weighs approximately 10 kg. The studs on this wall are spaced at 600 mm. The question relates to whether I will need to strengthen the wall or...
  3. R

    tile backer on top of dot and dabbed plasterboard ?

    Hi all. I'm looking for advice regarding the tile becker fitted on the plasterboard. It's about load capacity. How to increase the one on the plasterboard? Is it feasible without removing the plasterboard?? At the beginning of the job the customer wanted to go for 100x300 tiles so we've...
  4. S

    Light weight backer board

    I need to overboard an 1800 wide paramount plasterboard wall that only has studs at 900 centres. (one at each and and one in the middle running vertically) part of the wall will be in a shower cubicle so needs good waterproofing i think hardi or even aquapanel might be a bit too heavy and...
  5. S

    Maximum tile weight on sand/cement render backing

    Hello - I'm a homeowner in the process of choosing tiles for a bathroom in a newly built extension. The inner leaf walls are Thermalite 3.6N blocks with a sand and cement render inside. What's the maximum weight of tile that backing could take? I could find lots of information on the maximum...
  6. Davethefish

    9mm Ceramic Wall and Floor Tile weight question.

    i'm going to be remodelling my own bathroom, but it has paramount boards for walls on 2 sides (evil plaster board/ cardboard sandwich.) and is plastered on breeze block the other 2. the wall and floor ceramic tiles my wife wants have no m2/kg tile weight info, just 1.08m2 per box of 6 tiles...
  7. Davethefish

    Hi all.

    Hi and quick introduction, 30 years in the building trade, pipefitter/plumber/maintenance now semi retired. ;) i'll be posting a quick question the the tiling forum in a mo...:)
  8. E

    My 1st Job what weight tiles will paramount take

    Hi Guys, another newbie here, what weight in kgs per sqm will honeycomb plasterboard walls take please? Paramount Partition wall boards type. I want to fully tile my bathroom walls in 600x300 ceramic tiles but, since finding out the wall structure I am now concerned the walls won’t take the...
  9. L

    Light weight adhesives

    Light weight adhesives! For those of you that have used them enough to have an informed opinion what’s the pros and cons vs standard addy? I’m interested to see what the consensus is out there.
  10. L

    Marble tiles just over the weight limit

    appologies for what has come up time and time again. However this one is so close to the guidelines I can’t work out what to do. I have never fitted marble tiles before, and always had plasterboard suit my tile weight limit. (Have been lucky I guess in the last 8 years! ) I have been asked to...
  11. acaciaguy

    Lightest weight backer boards

    hello all I have a job where the walls are double thick plasterboard (both 18mm) on a stud wall ( between two flats to meet fire and sound regs etc). I don’t want to add the weight of a cement backer board (like nmp or hardie) on top of that. What is the he lightest board out there? Wedi ...
  12. J

    Substrate weight ratio / bonding

    hi all, So from my notes plaster can only take 20kg per m2 (including adhesive/grout). I’m just about to tile a wet room and my issue is this: I’ve had the room skimmed (it’s mostly a stud wall room with plasterboards, part of one wall is block). This same part block/ part stud wall had to be...
  13. M

    Aus Advice on tile weight

    I have ordered some porcelain tiles 600 x 300 8mm thick, I am now thinking I have to send them back due to weight. Its for an ensuite shower and the actual shower is moisture resistant plasterboard which is being tanked, this I know is ok with the weight. The issue is the rest of the bathroom...
  14. R

    Tile weight limits on walls

    ok so i read a post from Paul C on weight limits, that went: Wall Substrate Maximum Weight of tiling per m2 Gypsum Plaster 20Kg/m2 Gypsum Plasterboard Direct (without a plaster skim) 32Kg/m2 Plywood (WBP) Up to 30Kg/m2 Lightweight Tilebacking Boards Up to 40Kg/m2. Dependant on the type and...
  15. J

    USA Tile weight on plaster board walls, MR, Centres, data origin

    I know this has been asked lots before but I cannot find (after reading the White Book and 'Site Book Tiling) where the information regarding loadings for plasterboard are listed. I found plenty for Glasroc H. The question came up as a colleague of mine has boarded his bathroom with MR 12.5mm...
  16. S

    Light weight adhesives

    What are these light weight adhesives ? With what should we use them ? :confused:
  17. T

    Stud wall weight limits

    Evening all, I understand the weight limits for plasterboard, backer board etc, but.... I was wondering what is a reasonable weight limit for the actual stud partition wall? (As in, what's the limit before the framework starts crashing down) Is this something I should be considering on jobs...
  18. B

    Do you know your vans weight limits?

    I have a 63 plate Vauxhall combo short wheel base, I carry a lot of tools, cutters, stools and materials so I have to be careful and keep an eye on how many bags of adhesive, grout, screed etc I pick up from tile shops. If it’s a big job then I just get the materials delivered with the tiles...
  19. T

    Liquid tanking and how it affects weight limits..

    Above is a job I went too a month ago. The contractor said we’ve tanked the walls for you! I told him I wouldn’t tile the slope as it was and with 900x300mm tiles. Why he asked! I used my thumbnail to pick a bit off then proceeded to peel it like an orange - that’s why! So my question. If the...
  20. Chris Gibbs

    Tilemaster tilemaster light weight adhesive

    WOW tried this stuff today... its the business! easier on the arm, faster to spread, lighter to get out of the van. tilemaster take a bow. when I first mixed it up I didn't know whether to spread it on top of a cake or fix tiles with it, creamy or what. give it a go, great stuff.
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