In Nepal, fuel wood is measured in Chatta, its dimension is 20’ ×5’ ×5’.

A stack of 5’ ×5’ ×5’ is called quarter chatta.

Solid volume of firewood in a stack depends on several factors such as, care in stocking, form of billets, length of billets and their diameter.

As the value of fuel depends on the solid content, it is necessary to know the methods of determination of solid contents of stacked wood.

Methods of measurement of solid contents

1. Xylometric Method

Xylometeris used to calculate the volume of billets by the principle of water displacement consisting of graduated vessel and volume of wood. To find the volume of stack, the whole stack is first weighed and only a portion is sub-merged

W/w=V/v

2. Specific Gravity Method

Sp. gr. = Weight of wood/ Weight of same vol.of water = Density of wood/Density of water c.c.

Volume = Weight (in gm)/sp. Gr. = Weight (in lbs)/sp. Gr. × 62.5 cft.