If the density of lets say 'normal' wood runs about 50 pcf, and paper is made from wood, and books are made from paper, then how does the BOCA code (Live Loads - Table 1606) Note C get 65 pcf? And if you're going to say "the 65 pcf includes shelving", then dont respond - weights of shelves, chairs, desks, computers, etc. should already be considered in the minimum live load for the desired occupancy.
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Paper/Books/Wood
- Thread starter LPPE
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I think paper can have different weights according to how much it has been compacted during manufacture. The tissue and the green back don't weighs the same, do they?
Books are heavy because they also been printed on and some glossy papers contain more than just wood.
Anyway there is no answer to whether a beef burger should be heavier or lighter than the beef because in re-contituted form it can be compacted artificially.
Books are heavy because they also been printed on and some glossy papers contain more than just wood.
Anyway there is no answer to whether a beef burger should be heavier or lighter than the beef because in re-contituted form it can be compacted artificially.
jheidt2543
Civil/Environmental
Actually, if you look at the cross section of a piece of wood you see the end of the fibers, but also the "capillaries" or sap ducts. These account for most of the difference in density. Paper is made from the same wood fibers, but they are broken down either chemically or by grinding to make the paper. They are in a much more dense configuration in paper than in the original wood structure.
jheidt2543
Civil/Environmental
Just for the sake of clarity, what is MDF?
I think most re-constituted timber products like MDF, chipboard, fibreboard and the like are heavier than the original timber.
Wood is porous, contains sap and therefore has a significant mositure content. 99% wood floats in water (timber is lighter than water). The dry wood fibres must have been well packed togeter in order for paper to have a density higher than wood.
Lets stop the next guy asking why a DVD disc being the same size as a CD can holds several times more data.
Wood is porous, contains sap and therefore has a significant mositure content. 99% wood floats in water (timber is lighter than water). The dry wood fibres must have been well packed togeter in order for paper to have a density higher than wood.
Lets stop the next guy asking why a DVD disc being the same size as a CD can holds several times more data.
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