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).
2. In theory the shed should come apart easily. But if the shed has been in place for some time you may need to use a bit of force!! With any aged structure that has spent its life outside the fixings that were used to hold it together may have become rusted in place. Typically the panels that form a shed are held together with bolts or nails.