doesnt tip over Clips only take VERTICAL loads Usually just 1 wing sticking out

Doesnt tip over clips only take vertical loads

This preview shows page 33 - 36 out of 102 pages.

doesn’t tip over Clips only take VERTICAL loads Usually just 1 wing sticking out for the walls less easy to shake loose Once forms are set remove left and right forms & remove tie rod (left with a hole) can patch up or leave
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34 Components formwork for walls Thru tie rod Wing nut (single wing design resists movement under vibration) Spacer tube Polythene cones Rod coupler (only for thick walls) Formwork for concrete columns • multi -purpose panel with continuous rows of tie holes may be used for the construction of smaller/odd size columns • 4 panels assembled in the configuration depicted below can create a variable form for square or rectangular columns with adjustment in 50mm increments from 150mm to 550m Remains in place, leaves 2 smaller holes = good for watertight (doesn’t go whole way through) Form for the top half of the wall Supported on the bottom half of the wall- needs anchor points Panel raker bracket connects rakers to the side ribs need 2 to provide stability
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35 Formwork for concrete columns FORMATUBE for circular columns • constructed from laminated plies of fibre, exterior is of laminated tar and fibreglass impregnated paper, inside surface is coated with 0.02mm PE • sizes 254mm – 610mm ID • cut to length using a handsaw • bracing required • left in place to prevent moisture loss • strip 1 to 5 days after curing • two vertical cuts up the column and pull forms off, or peel spirally = easy to remove • Column Forms are a spirally wound metal column former = easier way to cover a column = curl a thinner rectangular piece around it • remove by spirally unwinding the metal former once the concrete has set leaving a fine spiral mark that is easily removed by light sanding • m ade from 0.55mm zincalume steel & supplied in lengths of up to 8m with costs at a per metre rate • diameters are available from 200mm up to 2400mm, minimum length of 600mm Bar Coupling Systems Coupler Selection 4 main types which require different fixing methods 1. Tapered Thread coupler designed to suit the majority of applications which require the joining of reinforcing bars the ends of the rebar are cut square and a tapered thread is cut onto the bar to suit the tapered thread coupler. The sleeve is tightened onto the threaded bar end using a calibrated torque wrench. 2. Bartec system one of the smallest couplers in the Ancon range The ends of the bars are enlarged and a parallel thread is cut onto the ends to suit the threaded coupler The coupler is assembled using a pipe or chain wrench = enlarge ends so when threaded = has the same diameter as non-threaded end 3. Bar X-L couplers a full strength joint and are the smallest couplers in the Ancon range appropriate for applications where fatigue is an issue ends of the bars are cut square and marginally enlarged. A parallel thread is then rolled onto the ends to suit the threaded sleeve coupler is installed using a pipe or chain wrench 4. MBT (mechanically bolted) suitable where it is not convenient to have the bar ends prepared for parallel thread or tapered thread couplers.
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