In this study the Laborer's Efficiency (LE) in building projects in Sulaimani City practically on field sites were investigated for Gypsum plastering (GP). Accordingly, four constructional different buildings as Multistory, commercial and houses were considered. Overall 11 main important factors during 30 practical records on field sites were practically observed. As a result, for the first time the Laborers' Efficiency (LE) was measured and classified in to three categories high, medium and low for two specific heights which were 0-2 m and 2-3 meters height of walls. On the other hand, concluded that the LE for the height of 0-2m affected on LP from 15.18 to 21.35 m2/hr., with a proportion of 40.6%. In addition to the LE affected-on LP for the height of 2-3m and varied the LP range between 13.33-15 m2/hr., with a proportion of 12.5%.

Ferrocement is one of the construction materials used to reduce both cross-section and eliminate coarse aggregates. In this experimental study the impact strength and strain energy of thin laminated mortar specimens were investigated. Five series of ferrocement sandwich panels with 400mmX400mmX50mm in dimensions were cast and subjected to drop impact loadings. The results of simply supported tested panels showed that using plastic instead of galvanized wire mesh increased the impact resistance of panels. Including a thin row of Styrophoam between the two mortar layers increased strain impact energy for failure load. Different crack patterns were recorded according to the type, number of wire mesh and percentage of Styrophoam content.