Mixed occupancies

In a mixed occupancy building it is wise to consider the design of separate ventilation systems for laboratory areas, areas servicing the public, animal holding areas, and administrative offices. 

In many cases, buildings are classified as mixed occupancy, which means that within a single building there may be several occupancy types, depending on the different activities carried on in it. 

Very complex mixed crystals with mixed occupation of all metal positions by... 

Fig. 36. The structure of MosCoSi projected on (001), after Andersson . Compare Fig. 35. There is mixed occupancy of most sites and this is not shown. Open circles are atoms at z c = 1/2 (1/2 or 0.49) filled circles are atoms at zk = 0 (0 or 0.01) dotted circles are at zlc = 1/4. Compare Fig. 34 and Fig. 35. One unit cell is outlined. Light arrows at the periphery of the drawing indicate the CS planes that transform CrsSi (Fig. 34) to M03C0SI. Note the block Vcolumn structure that results each column being 2x2 tetraederstem in cross-section (i.e. 2x2 unit cells of A15 1 x 1 of garnet). The columns are joined (at the CS planes) by edge-sharing of adjacent tetraederstem cf. comer-sharing in A15...

Figure 28 The structure of KBie.ssSio (cosalite type). The shaded areas are the site of extensive K/Bi mixed occupancy...

The various chromium carbides are relatively hard and brittle. They significantly increase the hardness and pyrophoric stability of carbon rich hard materials. These compounds are known as Stellite . The hardness of alloyed steels [9] results from several chromium-iron double carbides of compositions (Fe, Cr)3C2, (Cr, Fe)23C6, and (Fe, Cr)yC3. These mixed carbides crystallize all in the structures of the respective pure chromium carbides with a mixed occupancy of the chromium positions by chromium and iron atoms. 

Despite very clear structural motifs based on four-connected atoms within the frameworks, the clathrates seldom have completely ordered crystal structures. Different kinds of crystallographic disorder appear including defects in the framework and in the cages, mixed occupation by different elements, and positional disorder of the so-formed sub-sites. The resulting defect or substitution variants tend to form superstructures by ordering of defects or different atoms on the substitution positions. Most of these effects have already been studied on representatives of the clathrate-I type, thus some such examples are given below. 

BagGajsSiso- Qiu et al. synthesized BagGaisSiso via a stoichiometric route and characterized its structure [20]. The lattice parameter showed smooth expansion with increasing temperature. And the refinement of site mixed occupancies showed that Ga prefers to occupy the 6c site. 

Mixed occupancies often exist in a given facility or building. In a building where the area of a different occupancy is less than 10% of the area of the primary occupancy, a mixed occupancy is not considered to occur this is considered a minor accessory use condition. When a different occupancy exceeds 10% of the area of the primary occupancy, UBC considers the building a mixed occupancy and requires the summation of the ratio of actual area to allowable area for each occupancy to add up to one or less. When more than one occupancy occurs within a building, fire-resistive occupancy separations must be constructed between them as described in UBC Table 3-B and Sections 302.2, 302.3, and 302.4. Note that an H-1 occupancy may be mixed with any other occupancy. See Fig. 1. 

The number of peopie in the buiiding >- Whether independent stairways may be required for mixed occupancies... 

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