Mechanical Vibration Sample Clauses

Mechanical Vibration. Concrete during and immediately after depositing shall be thoroughly compacted; unless otherwise provided, the compaction shall be done by mechanical vibration to the following requirements:- The concrete shall be compacted by means of a mechanical vibrator operated within the mass of concrete. when required by the Superintending Engineer vibration shall be supplemented by hand spading. The concrete shall be spaded by hand in all covers and angles of the forms, and along from faces while it is being vibrated. The concrete shall be vibrated with a frequency of not less than 3,500 impulses per minute. The vibration shall be of sufficient intensity and duration to cause flow or settlement in to place and complete compaction. Over vibration shall be avoided. The mechanical vibrator shall be: of a type and design approved by the Superintending Engineer. It shall be adequately powered and capable of transmitting vibration of the required frequency to the concrete. A sufficient number of mechanical vibrators shall be provided on the job so that each batch may be thoroughly compacted immediately after placing and that there will be no delay in placing and compacting ensuring batches. The vibrator shall be applied to the concrete, immediately after depositing and so manipulated that the concrete is reduced to a uniform plastic mass thoroughly compacted. It shall be thoroughly compacted around the reinforcement and worked into the corners and angles of the forms. The forms of the reinforcement shall not be vibrated. Concrete shall be placed in layers of uniform thickness not exceeding 300mm (12") and the apparatus so operatea tna the vibrating element aoes not penetrate through the layer of the fresh concrete and disturb the partially hardened concrete in lower layers. Vibrators shall not be pushed into or withdrawn from the mass of concrete too rapidly. The water content of the concrete shall be the minimum necessary to produce uniformly dense concrete free from aggregate pockets or honeycombing 10-16-12 Surface Finish: Immediately following the removal of forms all cavities produced by the removal of form ties and all other hooks and depressions honey-comb spots, broken edges of corners and other defect, shall be thoroughly cleaned, saturated with water and carefully pointed and rendered smoothly with mortar of cement and fine aggregate mixed in the proportions used in the xxxxx of concrete that is being finished and of as dry a consistency as is possible to use, ...
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Mechanical Vibration. All concrete for exposed concrete work shall be vibrated, using needle vibrators -30/32 mm. Surface or trough vibrators may be permitted to be used for thin slabs. External vibrators for walls may be allowed but this shall be done carefully to safeguard the displacement of the shuttering. Vibrators shall only be operated by skilled labour; over or under vibration shall not be permitted. Any spillage, or leakage, which is unavoidable and which flows down the exposed concrete surfaces, shall be immediately washed away with clean water and brush. Exposed concrete members shall be finished to desired surface while the concrete is still green.
Sample 1

Related to Mechanical Vibration

  • Mechanical a. Heating and cooling load calculations as required and major duct or pipe runs sized to interface with structural.

  • Temperature Where low temperature and/or self-service cases are used for any of such merchandise coming under the jurisdiction of the Union, such cases shall be served only by employees covered by this Agreement.

  • Noise The Hirer shall ensure that the minimum of noise is made on arrival and departure, particularly late at night and early in the morning. The Hirer shall, if using sound amplification equipment, make use of any noise limitation device provided at the premises and comply with any other licensing condition for the premises.

  • Calibration The comparison of a measurement system or device of unverified accuracy with a measurement system of known and greater accuracy to detect deviation of the unverified measurement system from required performance specifications (of the unverified measurement system or device) and to quantify all measured values to applicable units of the international system of units.

  • Heating The Hirer shall ensure that no unauthorised heating appliances shall be used on the premises when open to the public without the consent of the management committee. Portable Liquefied Propane Gas (LPG) heating appliances shall not be used.

  • Insulation In exterior walls? Yes No Unknown In ceiling/attic? Yes No Unknown In any other areas? Yes No Where? Comments:

  • FABRICATION Making up data or results and recording or reporting them.

  • Electrical Provide drawings for the following systems:

  • Roof Any leaks or evidence of moisture? Yes No Unknown Type of Roof: Age Comments: Is there any existing fire retardant treated plywood? Yes No Unknown Comments:

  • Walls 12 Developer shall provide rustication patterns on all walls, except drainage headwalls, in Aesthetic 13 Area 3 in accordance with Exhibit L2.24 of the LAADCR. The final designs shall resemble these 14 simulations.

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