Membrane filters can be used for final filtration or prefiltration, whereas a depth filter is generally used in clarifying applications where quantitative retention is not required or as a prefilter to prolong the life of a downstream membrane. Membrane and depth filters offer certain advantages and limitations.
Concrete Hard-standing-When using concrete as a surface to support your new shed, you must ensure that it is level, flat and that it is dry in time for your shed delivery and installation. Here are the basic steps: 1  Using pegs and string, mark out the base area (allow 5 cm extra).
And how thick should it be. A concrete slab is one option to a foundation for your 12Ã16 shed. But this shed can also be built on a 2Ã4 treated floor frame (or larger floor frame) and OSB, plywood or other floor deck material. Constructing 16â on-center for joist spacing is the minimum recommended.