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Steel SpecificationSteel is sold as light, medium, full or industrial (?¹‚?¸£?¸§?¹??¸«?¸??¹?) which is a confusing system. The actual specification which refers to the strength required to deform 1 mm strand is printed on the side of the rebar, in this case SD30, on this 12 mm rebar. Only the full grade was used on all 6, 9 and 12mm throughout the project.dozer
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Column Frame MeshThe column footing frame is 90 centimeters wide (square) and includes a top and bottom lattice. The lower frame is composed of 9mm rebar with the column frame composed of 12mm rough with 6mm connectors. dozer
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Column Frame MeshAnother view of the footing and column framework with a 1.5 liter water bottle for size reference. dozer
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Column HolesThe holes measure 1 meter wide and 40 centimeters deep. dozer
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Frame on SpacersThe footing frame sits on spacers to ensure it sits equidistant within the footing. dozer
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Poured FootingThe poured footing. The footings are poured and then the ground beam is tied into place around the footing structure. dozer
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Ground Beam Diagonal MemberThe ground beam contains a fifth strand of 12mm rebar which runs in up and down diagonal fashion to increase strength. dozer
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Cinderblocks Form WorkThe cinder blocks are used as form work for the entire ground beam. The cinder blocks will remain after the pour and become part of the flooring material and the exterior walkway. dozer
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Red Brick SpacersRed brick can also be used as spacers (alternatively from the concrete spacers with wire ties) as needed. These are used to center the ground beam framework equidistant within the cinder block form work. dozer
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CompactorThe ground within the ground beam is new dirt which has been brought in, due to the fact that the floor level of the house will be higher than the original ground level. It is first watered and allowed to settle naturally. Then a compactor is used for further compression prior to the pouring of the floor.dozer
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Floor Structure with Damp CourseThe floor rebar is spaced at 20 centimeter intervals and red bricks are used as spacers. The damp course material is a heavy thick black plastic which is hard to find. It is more durable and resistant to tearing. The normal clear plastic is problematic and should be avoided. Of course, any damp course is better than no damp course!dozer
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Concrete Samples for Compressive TestThe floor and foundation are poured using CPAC 280 steng (which equates to 280 ksc or 280 kilograms per square centimeter of compressive stregth). The slump is 12 - 14 centimeters which is on the dry side for extra strength. The samples will be further analyzed at the factory and a report certification sent. dozer
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