![]() Without detailed calculation, joints should be detailed to permit 15–25 mm movement unless seismic pounding is an issue then this should be increased to min 200mm. ![]() Primary movement joints are required to prevent cracking where buildings (or parts of buildings) are large, where a building spans different ground conditions, changes height considerably or where the shape suggests a point of natural weakness. Where dowels are provided, their diameter shall not exceed the diameter of the column bars by more than 3mm.Ģ0. Lap splices shall be not be used for bars larger than 36mm dia except where welded.ġ9. Flexural reinforcement preferably shall not be terminated in a tension zone.ġ7. Bonded reinforcement shall not extend across an expansion joint and the break between the sections shall be complete.ġ6. ![]() It shall be formed vertically and not in a sloped manner.ġ5. The location of construction joints shall be at the point of minimum shear approximately at mid or near the mid points. Indicate all expansion, construction and contraction joints on plans and provide details for such joints.ġ4. Make sure that hooked and bent up bars can be placed and have adequate concrete protection.ġ3. In the case of bundled bars, lapped splice of bundled bars shall be made by splicing one bar at a time such individual splices within the bundle shall be staggered.ġ2. Congestion of bars should be avoided at points where members intersect and make certain that all rein. Show enlarged details at corners, intersections of walls, beams and column joint and at similar situations.ġ0. For a single structural member the number of different sizes of bars shall be kept to a minimum.ĩ. Use commonly available size of bars and spirals. Decide detailed location of opening/hole and supply adequate details for reinforcements around the openings.Ĩ. Indicate proper cover-clear cover, nominal cover or effective cover to reinforcement.ħ. Prepare drawings properly & accurately if possible label each bar and show its shape for clarityĦ. ![]() It is suitable for possibly initial sizing of structural elements for architectural scheme or costing purposes for actual building projects the size of structural elements must be veri?ed through detailed design by a quali?ed structural engineer.ĥ. This information is given without prejudice and is for guidance purposes only. plant rooms) or to unconventional loading scenarios.Ĥ. They do not apply to more heavily loaded situations (e.g. The figures given assume 'normal' commercial building loads. The possible spans, and associated depths, depend on the loading to which the beam is subjected. Never allow the concrete to fall more than 1 to 1.5 metres.ģ. If placing concrete directly from a truck or concrete pump, place concrete vertically into the face of concrete already in place. That in turn means that most of the "rules of thumb" are most applicable by the engineer that came up with them and that everybody else better be careful in using them.Ģ. ![]() This illustrates the fact that for a "rule of thumb" to be any good, the background for its development needs to be known. The cost of reinforce concrete (in place) is usually somewhere between $100/m3 and $800/m3. ![]()
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