safe work procedure for precast installationsafe work procedure for precast installation

safe work procedure for precast installation28 May safe work procedure for precast installation

Closely monitoring the site engineer's strict implementation of the Method Statement for laying Kerbs, Precast Concrete Barriers, & Paver Interlock Blocks Installation and Risk Assessment, the use of proper tools and equipment to maintain safety, certifications of equipment and their adherence to . Vehicle loading must comply with NZTAs The Official New Zealand Truck Loading Code(external link). The PCBU must engage with workers carrying out the work and their representatives when developing the safe system of work. Ensure the fixings are still secure and the system still complies with theerection design. Rigging specific Safe Work Method Statements include site establishment, setting up the work area, PPE, Working at heights, exposure to weather conditions, tools, plant and equipment handling, power supply, risk matrix, typical hazards associated with the rigging related on-site activities, as well as control measure to eliminate or control the . The ground should be strong enough to stop the wheels settling, and any slope should not make the vehicle or its load unstable. Objects falling from height can injure or kill workers or others. The documentation should include, where applicable, every aspect of the erection process: Note: details for edge-lift and other cast-in inserts requiring reinforcement should be obtained from the supplier. If elements are out of shape while stored, or stacked incorrectly, even for short periods, concrete creep can cause permanent distortion. psychosocial hazards (eg bullying, tight deadlines, other stress factors). BCITO is appointed by the government to develop industry qualifications and set standards for the New Zealand building and construction sector. Section 40 of HSWA specifies the duty of a PCBU who manufactures plant, substances, or structures. If the precast concrete elements are to be transported to storage, be clear about the type of elements to be transported and check that the transport will be fit for purpose. For example, a deadman may also be referred to as an in-ground or on-ground mass block; a lifting anchor may also be known as a lifting insert. This includes any amendments, notices to tenderers, agreed variations and all other information. (See Appendix F of these guidelines.). Methods of handling and storing will depend on the type of precast concrete element. Emergency plans should be tailored to the work and workplace: If a PCBU shares a workplace with other PCBUs, they should co-ordinate their emergency planning wherepossible. For example, a lack of sleep, poor diet, relationship issues, money problems, alcohol and drug abuse, ill-health and uncertainty about the continuity of work can all affect peoples ability to work safely. Whereverpossible, identify health and safety risks early and deal with them at the designstage. Park in areas that: Provide safe entrance and exit of the work area; do not create potential conflicts See Appendix J of these guidelines for an example. The operators should follow the controllers requirements and site policies regarding regular and pre-start checks. Set-UP For Spotter Set up scaffolding at correct height in order to safely control core when it comes free of hole. Brace connections should be designed with a factor of safety of 2.5 againstfailure. Health and Safety Committees (HSCs) support the ongoing improvement of health and safety across the whole workforce. Provide ongoing training as needed, including refresher training so that skills and knowledge are kept up-to-date. Figure 9 shows a purpose-built super-low loader with a rear-loading U-shaped chassis to carry tall precast concrete panels. processes and plans for incident investigations? PDF Preservation Webinar - Questions and Answers - 5/9/2023 4.1 Safe work procedure See Appendix IX. In these circumstances, the designers must consult with each other on the health and safety implications of the design. Monitor the performance of control measures to confirm their effectiveness. One or more cranes may be used to lift and place precast concrete elements. there are no other significant hazards, such as other people working near the storage area. Ensure the rigging and lifting equipment available matches the particular requirements of each element. The crane operator needs to have the knowledge and skills to operate the particular type of crane they are using. Alarms, extinguishers, escape routes, assembly points. caught between an element and any other hard surface. In many cases, loads on lifting anchors will not be equal, and will vary at different stages between the initial lift and placement into its final location. Is a site-specific traffic management plan required? manage risks to health and safety from work under objects raised or lifted by any means. Lifting anchors that are used for lifting and handling during all stages of manufacture, delivery and installation should be designed to a minimum factor of 3.0. The advice in these guidelines will help to minimise the likelihood of these situations occurring. When the design requires a particular sling length or lifting system, the designer should communicate that information to the rigger or the lifting supervisor. This is necessaryfor any work for workers regular tasks as well as the ones they may be called on to do (eg if a co-worker isaway). - falls. It further explains the duties of designers, manufacturers, importers, suppliers, installers, constructors and commissioners. whether the precast concrete element will be lifted repetitively over its design life? If so, how else will you share the information they need to know? may have flexible end connections to adjust to different angles. Incorrect installation of steel reinforcing. WorkSafe is aware that the construction and manufacturing sectors sometimes use different terms to refer to the same object or practice. Related duties of a person conducting a business or undertaking (PCBU). Objects falling from height can injure or kill workers or others. sliding failure (a panel kicking in or kicking out) during erection this can be prevented by base restraint. Figure 3214 shows some other possible configurations for lifting precast concrete elements. If the strongback itself is to be used as an attachment for lifting, it should be specifically designed, certified and rated for this purpose. Precast concrete is widely used in the New Zealand construction industry. The possibility of progressive collapse should be considered at all stages. The design should specify any additional reinforcement required to accommodate forces during handling, transport and erection. they fail without warning and are highly sensitive to installation procedures. Falsework should be designed to support loads imposed by the precast concrete elements along with environmental and other imposed loads. These guidelines offer advice on the safe handling, transportation and erection of precast concrete elements. MS - Precast Wall Installation Rev 0 | PDF - Scribd The way Health and Safety by Design is applied will vary depending on the nature of the design or work system and its intended use. moving precast concrete elements from temporary site storage. handling garbage. The loading of lifting anchors may be affected by: Steel reinforcing bars are not suitable as lifting loops and should not be used for that purpose. For example, when truck drivers or mobile crane operators are driving to and from a site, PCBUs must allow time for the required rest breaks. interest of those involved in the design, specification, use and installation of precast flooring products at heart. Engage with workers and their representatives at every step. The following factors need to be taken into consideration to ensure the stability of the load on the vehicle: The dimensions of the precast concrete elements must include the length of all protruding reinforcing steel. Work has the potential to harm a persons health, and a persons health can affect safety at work. What industry-specific training and/or qualifications does the worker already have? Handling, transporting and erecting precast concrete elements are high-risk activities that have resulted in deaths and serious injuries to New Zealand workers. are at, or in the vicinity of, a workplace, and whose health and safety may be affected by a work activity listed. Section 42 of the Health and Safety at Work Act 2015: Duty of PCBU who supplies plant, substances or structures(external link), Section 43 of the Health and Safety at Work Act 2015: Duty of PCBU who installs, constructs, or commissions plant or structures(external link), Health and Safety at Work (General Risk and Workplace Management) Regulations 2016 (the GRWMRegulations), GRWM Regulation 9: Duty to provide information, supervision, training, and instruction(external link). Rigging Safe Work Method Statements - Builder Assist The competent person should check structural integrity,braces and connections, and fixing points. Note that A-frames designed to hold precast concrete panels in a yard in a static environment have totally different loading stresses applied to them when used for transportation. Engage with workers about any proposed changes to the safe system of work. Inadequate structural capacity of foundations. how to avoid high impact loads on precast concrete elements? For example, equipment, material, tools anddebris can fall during work at heights. For example: Other PPE suitable for working with precast concrete elements may include steel-toed boots, gloves, safety glasses and high-vis vests. If laid flat, they may be damaged by their self-weight alone. If workers are represented by a Health and Safety Representative (HSR), engagement must involve that representative. PCBUs must follow a prescribed risk management process to manage the health and safety risks from fallingobjects that are reasonably likely to fall on and injure a person. Formwork or mould design can have a direct bearing on how precast concrete elements are cast and handled, and on the loads imposed during manufacture. Unless specifically noted otherwise, all temporary propping should: Propping for beams should allow for possible changes to the load distributionduring the construction process. processes for reporting and recording health and safety information,including key performance indicators? Moulds for elements like beams and columns may require specialist provisions to accommodate pre-stressing. The concrete strength required at erectiontime has to be clearly specified on the erection plan. Development, production, testing, inspection and application of lifting anchors and lifting anchor systems should meet acceptably high and consistent standards to ensure that they are fit for purpose. A client, a head contractor, a sub-contractor and a self-employed person at a precast operation are all PCBUs. 3. Risks need to be controlled effectively even though harm may not be evident for months or years. how the elements will be unloaded to avoid causing instability: an exclusion zone around the unloading area (to prevent people who are not involved in unloading from entering the area). what they must do to keep themselves and others safe. Table 10 provides recommended minimum dynamic factors for general use with the Factors of Safety defined in Table 9. inadequate structural capacity of foundations. The head contractor or the sub-contractors may also have special requirementsfor propping and bracing to ensure stability during construction. The load can roll if the driver pulls over to let cars pass and the shoulder cannot support the load. the lift plan, which covers how to carry out crane lifts, including (but not limited to) such details as the: bracing and propping details for each precast concrete element: type and angle (as designed and certified by a competent person), configuration and size of erection braces and, where applicable, knee braces, cross-bracing, and any other secondary bracing that may be required, on-site lifting and handling requirements, special lifting and handling procedures (eg to protect non-standard finishes), preferred lifting and handling system to suit available equipment, additional reinforcing for handling, transport or for other reasons, all anchors and other components to be cast in for lifting, handling or fixing, type, make and location of all required lifting anchors; if additional reinforcement or tension bars are required for the lifting anchor to reach the full capacity, specify size, length and location of the reinforcement. A PCBU has the primary duty of care the primary responsibility for ensuring peoples health and safety at work and also ensuring that persons (including other persons) are not put at risk by the work being undertaken. See Section 2 of WorkSafes interpretive guidelines General Riskand Workplace Management, Part 2 [PDF, 421 KB](PDF). The bottom level of dunnage should transfer the load to the ground or whatever surface it is on without overloading it or causing excess settlement or deflection. Damaged or incorrectly assembled rigging. For elements undergoing rotation during the lifting operation, all conditions listed above should be taken into account. Purpose-built trailers have a significantly lower centre of gravity as the precast concrete panels sit either in a well in the centre of the trailer or on an outrigger on the side of the trailer. 4Lifting inserts and lifting insert systems for precast concrete elements. Concrete Repairs - Precast taking reasonable care of their own health and safety, taking reasonable care that what they do (or fail to do) does not cause harm to any other person, co-operating with any reasonable health and safety policy or procedure of the PCBU, complying, so far as is reasonably able, with any reasonable instruction given by the PCBU, so the PCBU can comply with the law. Ensure enforcement of safety procedures in accordance with the approved HSE Plan. the transfer strength required for pre-stressing. Tilt panels may slide during the initial lift and sliding should be controlled. The erection sequence should minimise multiple handling. All lifting clutches should have a record showing the period of test validity and maximum allowable capacity. The transport operator must provide information, training, instruction or supervision for drivers. A competent person makes sure that the rigging is set up as designed. Key terms are explained below. The Tilt-up and precast construction Code of Practice is an approved code of practice under section 274 of the Work Health and Safety Act 2011 (the WHS Act). Reasonably practicable means a PCBU does what is reasonable in their circumstances to ensure health and safety. Examples of Crane Exclusion Zone tape and a Crane Exclusion Zone sandwich board are shown in Figures 27 and 28.11. The certificate should show: Some racks used for on-site storage can also be put on the back of trucks. What weather conditions are expected during the project (eg seasonal changes)? Consider whether special restraints or packing are needed: Workers should not detach restraints until the vehicle has stopped in the area agreed for unloading. Prefabricated concrete is a concrete element that is manufactured somewhere other than its final place of installation. Will training be paper-based, audio-visual, and/or computer-based (including on a tablet or smartphone)? An exclusion zone is a defined area where people are not allowed to go when particular work is being done. Legal requirement that has to be complied with. This will involve consulting,co-operating and co-ordinating with other PCBUs. Use the highest appropriate factor of safety that can be applied when specifying any cast-in components that may be used for lifting precast concrete elements. Consider whether a small incident could escalate to a serious situation. Details to record could include: WorkSafes interpretive guidelines General Risk and Workplace Management (Part 1) [PDF, 629 KB] See Section 3: Information, training, instruction and supervision, WorkSafes special guide Introduction to the Health and Safety at Work Act 2015 [PDF, 640 KB], WorkSafes guidance Providing Information, Training, Instruction or Supervision for Workers [PDF, 58 KB]. are issued by the client to the head contractor, and by the head contractor to the precast manufacturer, may include specifications and drawings for the precast concrete element, include dimensions, material properties and fixing details. To reduce friction, mould sides should be detailed with adequate draw, or be released to allow them to spring back. It is not possible for WorkSafe to address every situation that could occur in every workplace. Section 40 of the Health and Safety at Work Act 2015 (HSWA): Duty of PCBU who manufactures plant,substances, or structures. Some elements may not be able to be lifted until the wind speed reduces. processes for identifying hazards, assessing risks and identifying controlmeasures to manage risks? When using three lifting points, a competent person should determine the load on each individual lifting point considering the location of the centre of gravity of the precast concrete element relative to the centroid of the lifting points. other activities on-site when the precast concrete elements are being transported? The head contractor on the construction site should ensure that the traffic management plan is available on-site at all times when work is being carried out. They explain relevant legal requirements of HSWA and applicable regulations, as well referring to other legislation such as the Building Regulations 1992 containing the Building Code. the appropriate Transport Service Licence (TSL), documented standard operating procedures (SOPs). carry out reasonably foreseeable workplace activities (such as inspection, cleaning, maintenance or repair) in relation to: the manufacture, assembly or use of the plant, substance or structure for its designed or manufactured purpose, the proper storage, handling, decommissioning, dismantling or disposal of the plant, substance or structure. New Zealand concrete structures standard (NZS 3101), New Zealand steel structures standard (NZS 3404), New Zealand structural design actions standard (AS/NZS 1170). The crane comes in contact with overhead or underground power sources. ), drawings showing the location, dimensions, concrete strength and reinforcement of all deadmen, all foundations have been constructed in accordance with the drawings, the concrete has reached the specified design strength. Information about site offloading and erection can be included in one or more of the following documents: Precast concrete elements should be erected according to a documented and planned sequence. structural and precast concrete element documentation? They also provide guidance on how to meet the requirements of the Health and Safety at Work Act 2015 (HSWA). These guidelines use terms that are in common use in New Zealand. 3. ), the workplace itself (eg ground conditions, underground services). Design should consider wind zones and ground conditions, and refer to the latest version of the following standards: Frames used to support precast concrete elements during transport, whether they are part of the transport vehicle or an add-on, should be secured to the truck or tray to prevent movement during transport. Consider specific design components that may affect transportation, including: Although a purpose-built trailer should be the first choice for transport, precast concrete elements are not always transported on specialised trailers. identification marks are visible before and during unloading, unloading can be carried out in the proper sequence, weight is evenly distributed, and the load is stable. Note that: Precast manufacturers should be aware of the hazards and risks of the stressing operation and have adequate control measures. This could be a PCBU or a principal employing contractors, for example. PCBU installers, constructors and commissioners of plant and structures must, so far as is reasonably practicable, make sure that the way that the plant or structure is installed, constructed or commissioned is without health and safety risks to specified people. The most effective risk control measure eliminating hazards is often cheaperand more practicable to achieve at the design or planning stage than managingrisks later in the lifecycle. designer/s who contribute to the development of a safe system of work for the erection of precast or tilt panel concrete elements. See the NZTA website for information about work time and logbook requirements. This may include, but is not limited to, the items shown in the following list. The dogman/rigger is qualified to sling loads and direct the lifting and placing operations of a crane. Friction or suction to the mould can increase the force required to lift or release an element from the mould. Officers have a duty to ensure the PCBU complies with its duties under HSWA. See these websites for additional information and examples of other rigging arrangements: Note: In the figure below F means face lift. Is the lifting equipment compatible with the anchors cast in to the precast concrete element? When storing multiple precast concrete elements, follow any specific instructions. Stop all operations if the Crane Exclusion Zone is breached. The PCBU must address the risk of workers being exposed to a suspended load. a person being caught between a precast concrete element and another object (eg mobile plant) while elements are being handled.

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