(i) Hoarding:- is a temporary fence built round the new site to prevent the public from having a free access, and to safe-guard the structure and materials on site.
(ii) Grubbing:- is clearing of the building site, uprooting the trees scraping off of the vegetable soil. It is the preliminary site operation of clearing and leveling of the building site
(iii) Site investigation:- Before building operation is commenced on any building site a through examination of site is made to determine its suitability for building and the nature and extent of preliminary work that will be done.
(iv) Soil investigation: This is to determine the soil conditions of a particular site on which building is to be erected. This is done (i) By digging several holes about three spits deep with. (ii) Drilling holes up to 2 or 2.5m deep with a hand auger. (iii) Driving a pointed steel bar about 1.5m into the ground for residential building. But for larger houses houses: (i) Trial holes (ii) drilling bore holes and (iii) Load testing are used.
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