does not comply with the requirement, steel plates shall be applied as per the stipulations for block work design.
2.1.2.5.5 For exterior wall corner and cross joints, blocks shall be laid with overlaps every other layer.
2.1.2.5.6 Positioning and Correction: It is not advisable to make watering on normal blocks of small size. When the weather is hot and dry, one may spray some water on the blocks. The blocks with less than 28 curing days shall not be worked with. Their rigidity shall comply with the design requirement. Their surfaces shall be cleaned and then move to the work place. The block work shall be made in the way as: first far away places, then closer; first lower layer then upper layer; first exterior wall then interior wall; start from the corner or the positioning block for each layer; correction shall be made when one layer completed; the level and flatness of the wall shall be well controlled.
2.1.2.5.7 The wall shall be executed one layer after another and no step-shape wall is allowed. The height of the wall made daily shall not more than 1.8 meters.
2.1.2.5.8 The cross corners and corners shall be made simultaneously. The teeth-shape wall are not acceptable. The horizontal projection of the step-shape wall shall not be smaller than two thirds of it height.
2.1.2.6 The Roof Water-proofing Work
2.1.2.6.1The roof work is one important part of the construction
project. The roof work quality is closely related to that of the project. To ensure the roof work quality we have to apply comprehensively the administrative and professional techniques, and scientific methods with the roof structure, its capability, function and outlook as the control points.
2.1.2.6.2 Identify the slope, mark the lines, start from the parapet, in the order of ditch and discharge, make the layout to control the level and slope. The slope must comply with the design requirements. The water trap for discharge shall be made as a small pit. The slope shall be smooth for discharge the water. The surface of the screed shall be compacted and easy for water discharge. When the mortar sets, smoothen with a trawl. Finally remove gently the wooden strips used to separate the whole roof.
2.1.2.6.3 The Insulation work: On the surface of the screed apply one layer to separate from the air. Then fix the insulation. It should be level, dry and clean. The insulation blocks shall be fixed close to each other, and overlap properly between the upper and lower layer.
2.1.2.6.4 The Protection Layer work: Properly fix the joints and the squares as per the design requirements. Thoroughly clean before casting. Ensure the thickness and the slope. Smoothen the surface with an iron trawl when mortar sets. Then cover the roof with straw bags and make curing for 14 days. No bod is allowed to step on the roof during the
curing period.
2.1.2.6.5 Water-proof Layer: The base course shall be level and smooth, the slope complies with the design requirements, no grains of sand, dust and etc. The water content shall not be more than 9%.
2.1.2.7 The Decoration Work
2.1.2.7.1 As per the progress of the civil work, many temporary stores for civil work are empty. They may be used for the decoration products and semi-products. Those temporary stores shall be closed and equipped with guards to prevent the said materials from being accidentally damaged and dirtied.
2.1.2.7.2 Cleant and wet he walls before working on them. Water
the wall wet through one day before plastering. Hollow blocks shall be wetted 2 days in advance and more than twice a day (It depends on the weather conditions at site.)
2.1.2.7.3 Before plastering check the walls if they are level,
vertical and etc. Then make cakes and guidelines for plastering. The upper cakes are on the height of 1.80 m while the lower cakes just above the top of the skirt. Guidelines or control lines may be made between the cakes as references for the work of rendering.
2.1.2.7.4 The mortar for plastering shall be strictly measured and
mixed. The mix ratio and the density is subject to the approval. The mortar mixed with cement and gypsum shall be used up before it first sets.
2.1.2.7.5 The Technological Process of Plastering: Close the gaps around the doors and windows—clean the walls—splash water and wet the walls—check the walls if level ,vertical—make cakes and guidelines—fix the corner protective strips—plaster the windowsills—plastering: first course, second course—fix the separate strips—smooth the surface course.
2.1.2.8 The Paint Work
2.1.2.8.1 Paint is applied for the surface of block and brick walls. So it is necessary to smooth the plastering surface and wet the wall with brushes. Keep curing for 7 to 14 days under the normal temperature. When the water content is less than 10%, paint can be done. Before painting, fully stir and mix well, and make it without any sediment.
2.1.2.8.2 Technical Process: Base course plastering—first coating of putty—second coating of putty—paint
2.1.2.9 The Door and Window Work
2.1.2.9.1 There are various doors and windows in the project. They shall be manufactured as per the requirements and products and semi-products shall be stored separately. Doors and windows of different kinds shall be carefully checked before installation.
2.1.2.9.2 The installation of the doors and windows for this project shall be done with the method of fit-in. The window frames are forbidden
to be fixed by fastening bullets. Before installation fabricate concrete blocks similar to the bricks and fix them properly when laying the bricks. The steel plate embed in the block is used to connect the window frames. The installation of the door frames is to connect the wooden blocks embed in the walls. The frames of the door and window work are executed with the wall work. So after the installation of the frames the other work is still going on at site. Workers have to take measures to protect the door and window frames already fixed and no damages will happen to the same.
2.1.2.10 The Scaffolding Work
2.1.2.10.1 The scaffolding work is made with steel pipes and clips with safety net tied around. The base for the vertical pipe shall be leveled and compacted solidly. The water is easy to be discharged at site and no water will gather around on the ground surface.
2.1.2.10.2 The distance between the inner and outside bars is 1.0m, the row space 1.5-1.8m, the height of each layer 1.8m and the distance between the wall and the inner bars,20-30cm. the longer and shorter bars are 10-20cm out of the scaffolding. The whole scaffolding is supported with bridgings thus forming a complete system.
2.1.2.10.3 The Removal of the Scaffold，the removal will be done from the top to bottom. Take away whatever has been removed. The ties to the wall to fight against the wind shall not be moved in advance. The two
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