COLUMNS
Vertical structural (post) member fixed at both ends and
subjected to axial compressive load. Column used to support the weight of roof or
the upper roofs. Now days, many columns
are used for decorative purposes.
PAPER SIZES
International paper sizes The basis of the international series is a rectangle having an area of one square metre (A0), the sides of which are in the proportion of 1:2. This is the proportion of the side and diagonal of any square. All the A series are of this proportion, enabling them to be doubled or halved and remain in the same proportion, which is useful for photographic enlargement i or reduction. AO is twice A1 which is twice A2 and so on. Where larger sizes than AO are needed the A is preceded by a figure, thus 4A is four times A0. The B series are sizes intermediate between any two A sizes.i This series is used mostly for posters and charts. The C series are envelopes to suit the A sizes. DL or long sizes are obtained by dividing the A and B series into three, tour or eight equal parts parallel to the shorter side so that the proportion of 1 2 i...
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