Use plans, mark-outs, locators and safe digging practices when working near buried services. always approve any soil removal above ground anchors. 0000036884 00000 n Consider the excavation’s zone of influence on the stability of any nearby structure and make sure the excavation does not remove any nearby structure’s ground support. Old or improperly marked services may vary a lot from the recommended markings, always treat any uncovered service as electrical or gas until identified. Simon joined the Dezignatek team in 2010 coming from a strong background in customer service and sales. 0000036758 00000 n A confined space is an enclosed or partially enclosed space, not intended or designed primarily for human occupancy, where there is a risk of one or more of the following: If the excavation’s characteristics meet the defined criteria refer to AS 2965 Confined spaces to find out the appropriate work methods, risk management, and emergency planning. Phone. Self-propelled rubber-tyred scrapers can excavate and haul very large quantities of material economically over long distances at relatively high speed. (or sloughing) may occur as a result of tension cracks, In addition to sliding, tension cracks can cause. identify which workers or others are at risk, determine what sources and processes are causing that risk, identify if and what kind of controls should be implemented. About Services Projects Contact REQUEST FORM About Services Projects. Use suitable plant and equipment maintained in good condition to carry out excavation work safely. Competency is based on recent knowledge, training, understanding, and experience with a wide variety of considerations, some of. Installation of underground power, water, phone/fiber and gas by qualified and experienced tradesmen, using top qual workplace changes may impact on the effectiveness of controls > new or different risks are associated with a change in work systems or work location. Plant defects should be reported immediately to the PCBU. Install ground anchors in grout fi lled drill holes. workers need to breathe air that is or has been compressed or breathe a respiratory medium other than air. 0000001496 00000 n The competent person should design hydraulic support to resist the expected ground pressures and potential for collapse. All excavation work must comply with HSWA and associated regulations. Isolation: Isolate means preventing contact or exposure to the risk. Where ladders meet a landing, off set the ladder below from the ladder above by at least 600 mm. static and dynamic loads near the excavation, identifying all existing overhead and underground services, securing barriers or fencing to keep members of the public and other site workers away from the excavation site, what exposures might occur, such as noise, ultra-violet rays, falls or hazardous chemicals, possibility of unauthorised access to the work area, implementing a safe system of work or safety management system, identify hazards, assess and control risks, testing and checking for plant, equipment, and materials requirements, exclusion zones where powered mobile plant will operate. 0000034761 00000 n In some cases this may include following guidance or instructions from a service representative on site. hose burst protection valves are required (except for load-lifting mobile plant used in forestry operations that do not involve the construction of forest roads). LED street lighting. When organising site security and site access, consider: Safety fences prevent people from gaining access into hazardous areas. A competent person should design any timber shoring conforming to the timber sizes and grades specified in Table 6. If there are other workers on the construction site the exclusion zone applies to them, even if they are not involved in the excavator operation. Reduced MADs are available where: ECP 34 defines a ‘competent employee’ as an employee who can demonstrate the necessary knowledge, skills and experience to carry out electrical or telecommunications work in the vicinity of overhead electric lines, or exposed live metal, safely and to the standards used by the employer. If a gas line is ruptured, nearby running plant could cause the gas to ignite. There are three main types of controls to prevent ground collapse. For deep pits this normally requires welded steel frames to be designed and built into the installation. These can ignite if they are present in explosive limits. When deciding how to do a job safely, make sure to check any industry specific guidance. First try and eliminate the risks but if that is not reasonably practicable, then minimise them, so far as is reasonably practicable. There are times when certain work risks must be dealt with in a specified way. � This might happen in a: PCBUs that share no contractual relationship may still share overlapping duties, such as when they work on the same site. Health monitoring applies to workers if they are at risk of airborne asbestos exposure when carrying out ongoing asbestos-related work or asbestos removal work and are at risk of exposure to airborne asbestos when doing that work. 0800 425 622 . Bulldozers and scrapers are often used to prepare a work area for further specific excavation. They should also be sloped to reduce the possibility of water scouring. They will co-ordinate the response to any emergency. x�b```f``Kc`e``�� �� ,l@���|!ʢ�@�TN*�(��"�������e��H����R�788��Eָ�8ƾ�͍m=�i����X��T2�b�b�f�ž�>���Ov!��l���l[�~����ezš�v�u[��B�l����YeY���La��z('�1�U�m3�6�-l �l\�,n�gּ9s��TϪ5�� љ3�V�SkN�:��ԛW@��g�}����x+v�X�5��E���Ѳߛ��K7ޫQ�bl�/al�W;� ���!���!\"2J���ws`��Ngr-��!��J��� �`s���pa�`�@[@�m1���*x�S rLc�w�d@�q-C �-���p��iM�,>®)�Q��P���̓�3 #�����"�S#'���_�i fZ�ǛX]���"���O����9�&#��&%5̼��`3��9�H����8 &U�VFATH�� �!`��f��M�� ���JE.�X�����!9�Q� B 20mm, 25mm, 32mm, 40mm and 50mm NB PVC conduits colored orange or grey are manufactured in accordance with AS/NZS 2053.2:2001“Conduits and fittings for electrical Unless the excavation is so shallow those outside can see and talk easily to those at the face, provide an effective signalling system and interlocks that prevent winding gear from operating while personnel are moving. 0000002731 00000 n Means to form an angled excavation face, usually less than the natural angle of repose, to prevent ground collapse. Where can I find WorkSafe's guidance and advice about COVID-19? What are some of the health and safety risks associated with my industry? Some workplaces use job safety analysis (JSA) or task analysis (TA) to do this, process analysis: identify hazards at each stage of the work plan. A WES is the level of a substance in the air that is believed to be safe for nearly all workers repeatedly exposed, day after day, to that substance. Some situations that increase soil stress in an excavated face and may lead to failure in bad weather, under extra load or vibration are: Some conditions that may reduce soil strength are: Weak, saturated, or otherwise unfavourable ground can have a significant effect on the construction and performance of an excavation. This video is unavailable. Phone. We adhere to strict H&S systems to minimize any risk when operating on your site. If a defect is likely to pose an immediate or imminent risk to health and safety, remove the plant from service until the defect is fixed. This should be held on site. If the conditions during construction are not as expected, or if conditions change during the course of the work (eg different soils, heavy rain/flooding) take immediate action to protect workers, other people and property. dewatering techniques (ie water removal), improved by using: available space within and around the excavation, depth to the existing groundwater and the necessary increase in this depth to permit access to the excavation, soil permeability in and around the excavation; note: this may vary across the site, structures or underground surfaces near the excavation that may be damaged because of dewatering induced ground settlement. 03 941 8999 . Powered mobile plant should not operate or travel near the edge of an excavation unless the shoring can support such loads. Where work is located on roads controlled by a local authority, check with the local authority as to what is required for appropriate traffic management. Therefore, make an assessment of the appropriate level of competence for each individual excavation. Keep people away from the mobile plant in case of electrical contact. Are the workers who are excavating and shoring the trench experienced in this sort of work? (b) in relation to a person of the kind described in subclause (1)(b), means a person working in the workplace. Underground utility designating is the process of identifying and marking underground utilities. (8) Soil weight refers to the weight of one unit of a particular soil. Heavy-duty equipment may require  disassembly for transport. If not, is the variation permissible? 0000035728 00000 n • Any underground service or asset laid within public owned open space, or rights of way, or easements on public property. Remove shoring and all supports in a way that protects workers from ground collapse, structural collapse, or being struck. Before producing any final design documents and safety report, consider: Excavation depth and type - normal conditions(1), Table 1: Recommended competencies for excavation work, EXCAVATION DEPTH AND TYPE – COMPLEX CONDITIONS NOT COVERED IN TABLE 1(5), Table 2: Recommended competencies for more complex excavation work. the operator remains inside the excavator unless threatened by fire, all workers keep well clear of the excavator and anything else in contact with electricity, and shuffle to clear the area, to initiate an emergency response, including with the service owner to shut down and isolate the affected service. Potholing is usually a small excavation or inspection hole to find underground services. %%EOF Class A is the highest accuracy order of service location. communicates with each other to identify hazards and risks, talks about any health and safety concerns, Shored,(2) benched and/or battered (eg shored) as per table 6, waller and brace solution up to 6 m in depth), Requiring detailed analysis of site, significant structural design analysis and sound engineering judgement, All sheet piled excavations (cantilevered, propped, or ground anchored), and excavations shored with H-pile shoring and lagging, Shafts and drives framed with timber or steel with poling boards, lagging or laths. The ability for shoring to use soil arching depends on the consistency of the soil. > if the excavation extends through poor ground conditions. Lagging does not extend below the excavation’s base so do not use H-pile shoring and lagging where there is potential for base heave or water and soil flows. In fact, we have gotten so many requests for an explanation of universal color codes for utilities, we decided to answer them here. Sheet piling is eff ective in high groundwater conditions preventing soil escaping behind the excavated walls, and when base heave is a risk because of weak soils. Competent person (including competent operator). Most excavator related deaths involve a person working in the vicinity of the excavator rather than the driver, use a trained spotter in a safe position to direct excavator operation and any pedestrian movements, make sure the spotter and operator understand the signals they will use and agree on the way to communicate with each other, select plant with minimal tail swing if slewing in a confined area, maintain over 0.5 m of clearance between any part of the machine, particularly the ballast weight, and the nearest obstruction, checks the attachment is securely attached by the quick hitch. Placing or stacking spoil near an excavated face puts workers at risk because it adds an extra load where it is placed or stacked. Does the pumping arrangement avoid drawing material from behind the sheeting? Plan for emergency situations where there is incomplete information about services. (1) In Regulations 24 and 25, the term employer means -, (a) every employer, in relation to every workplace under the control of that employer in which any construction work is carried out; and. .. Where this happens the PCBUs have overlapping duties. 0000033368 00000 n Is the method of withdrawing sheeting and support for the trench during backfill safe? For more information see WorkSafe’s fact sheet. Local regulations or resource consent conditions may also stipulate other controls for excavating near existing structures. A report from a competent person can provide information on the stability and safety of an excavation. Is the work being done in accordance with the drawings or sketches? The rail posts and panels can be raised simultaneously with the backfi ll operation. Use shoring designed and installed to carry extra loads, including groundwater pressures, saturated soil conditions and saturated spoil. Email Us. From the rich red of Roaring Meg to the brilliant blue of Lake Tekapo, natural shades like Narrow neck to the soft pinks of Alexandra. Shafts and drives are often constructed to provide access or ventilation to a tunnel. Those matters include, but are not limited to: Only consider cost after assessing the extent of the risk and the available ways of eliminating or minimising the risk. 027 445 4860. For more information see WorkSafe’s Approved Code of Practice for Operator Protective Structures on Self-Propelled Mobile Mechanical Plant. determine if any supports to brace the structure are required. To select suitable plant, consider: A competent operator should use earthmoving machinery for its originally designed purpose. An excavated face’s stability depends on the strength of the soil in the face being greater than any stresses. Contractors will paint different colours onto the pavement to mark areas with underground utilities by using the colour code. (9) For more information and any exceptions refer to WorkSafe’s New Zealand Electrical Code of Practice for Electrical Safe Distances (PDF 875 KB) [PDF, 875 KB]. 0000036715 00000 n Routes, maps, plan a journey, tickets sales, realtime traffic and travel updates. Timber lagging is normally used between the H-piles every 1.8 to 3 m. Each excavation will require a site-specific design. The ground conditions will have a significant impact on what excavation method to select and the controls to use. Some industries have guidelines that deal with specific problems faced in their working environments, such as the electricity sector or plant and machinery hire. Consistent use of colour across journey planners, signage and livery etc, also helps guide passengers to their destinations. Battering is where the wall of an excavation is sloped back to a predetermined angle to ensure stability. Alternatively, a competent person should design the installation of any proprietary hydraulic frames and struts. For more information see WorkSafe’s special guide Introduction to the Health and Safety at Work Act 2015. 0000011049 00000 n In general, it means any person (including a legal entity) running a business or undertaking. Excavation work may seriously affect the stability of any structure near the excavation. A steel or metal structure with two vertical side plates permanently braced apart by cross frames or struts designed to resist the pressure from the walls of a trench and capable of being moved as a unit. Operators of powered mobile plant can often have severely restricted visibility of ground workers or nearby pedestrians, particularly those close to the plant. This may be required to approach services using hand-held mechanical tools, or mechanical methods, and to backfill the excavation. Underground Services Detection & Potholing - Hamilton. using ventilation – whether natural, forced, or mechanical to control leaking or seeping toxic gas. When working close to others, keep workers sufficiently far apart to prevent injury. 7.3.1 Quality Class A – Direct Services Location. This guideline does not apply to shafts associated with mining operations, or tunnelling operations, which are regulated under the Health and Safety at Work (Mining Operations and Quarrying Operations) Regulations 2016 (the MOQO Regulations). Figure 48 and Figure 49 show some of the blind spots for operators of typical excavation equipment. If a risk cannot be eliminated, it must be minimised so far as is reasonably practicable. The USL shall classify the located underground services to allow the end user to place an appropriate reliance on the data and label the underground services information by the following quality classes on the DBYD plans as a part of the report. If applicable, carry out checks before leaving the depot, and report any concerns according to company procedures, for example by tagging unsafe equipment. Before any excavation takes place workers should know what is underground and what is overhead. 276 mentions J’aime. Slide-rail shoring is diff erent from trench-shoring boxes and shields, because all parts including posts, panels, and rolling-strut assemblies move during the excavation. With relaunched home visits and a new Online Colour Consultation option, we’ll have you enjoying your home refresh sooner. Use trench-shoring boxes and shields where access is available for an excavator or backhoe to install or extract it from a trench. GPS MAPPING . The zone of influence’s angle will depend upon site-specific factors, for example soil strength and density. During excavation work, there will be circumstances that require some form of manual work including: Tasks which may lead to manual handling injuries include: Manual excavation methods are generally used for small, shallow excavations (eg less than 1.5 m deep) in soft soils. 0000036339 00000 n beforeUdig has no financial relationship with the below training providers and neither recommends or accepts responsibility for the outcome of training provided by them. 0000018358 00000 n Is the supervisor making sure that no-one climbs on the timbering? When dealing with service entrance cables on new homes, the question often comes up about underground and overhead feeders. A spotter should be in constant contact with the mobile plant operator. Avoid underground services and make sure not to undermine nearby structures – use safe digging practice and dig away from them. Over the last nine years Simon has gained immense experience in the joinery industry and holds a high level of product knowledge. Auckland Weather Forecasts. Reinstatement Specialists in Auckland Complete Underground Services also provides reinstatement services for all types of surfaces, being cobbles, concrete drives and paths, ashphalt and landscaping. A competent person should design the ventilation system so it provides plenty of ventilation throughout the excavation. Two individual contractors agree to co-ordinate their obligations for providing first aid equipment or personal protective equipment (PPE). means of entry into and exit from the excavation. Sheet piling is usually driven well below the excavation’s base. Has the meaning provided in HSWA. Each excavation has its own unique set of considerations to address during the design process, some of which may not be immediately apparent. ����VϤ��C�Έ��&pxC�AT�:k J�R�HV�@g check with the service owner for their duct and marking colours and identify what the underground services are and their status. Benching and battering of excavation walls can minimise the risk of soil or rock slipping onto the excavation. A system of working covering how a piece of work or a project will be completed safely and in compliance with relevant legislation. Check service depths as they may vary from the plan (eg the ground cover may have been altered since the service was laid). Transport explosives in accordance with the Land Transport Act 1998 and regulations and HSNO. This colour has spiritual importance to the Māori by whom it is known as kōkōwai. Other people at a workplace potentially at risk from work activities include volunteers, customers, passers-by, visitors, other PCBUs, or workers of another entity. The colors and what they are used for: Any excavated material and external actions applying a load to the ground nearby can affect the excavation’s stability through the zone of influence. Slide-rail shoring is available in parallel configurations for trenches or rectangular confi gurations for deep pit excavations. Only a competent person should be designing temporary works. it is uncertain a hazard may cause injury or illness, a work activity involves different hazards, and the workers involved do not know how those hazards interact to produce new or greater risks. 0000010173 00000 n Place toms, walings, or hydraulic bracing frames and struts into position as the soil is excavated. Consider having ground investigations and geotechnical assessments for excavations that are complex or may affect nearby structures or harm workers and others nearby. Proudly NZ Owned & Operated; Next Day Delivery On Ex Stock; New Zealand wide service ; Home > Shop Shop. Note there will always be a blind spot for the operator in line with the boom. A ground anchor is a structural element installed in soil or rock to transfer a tensile load into the ground. Information on all forms of transport in London including cycle hire. As part of your safe system of work, make sure workers do not enter any unprotected part of the excavation. Each PCBU can determine the best way to meet its duties, depending on workers’ views and needs, the size of the organisation and the nature of its risks. A continuous frame with vertical or horizontal sheathing planks placed side by side to form a continuous retaining wall supported by other shoring parts to hold up an excavated face. 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And haul very large quantities of material short distances or more excavations can change quickly when the soil to outward., working in close proximity to plant and equipment used for hauling spoil from the hand-held tool the... Or mechanical methods, such as pipe drilling pits: making sure no-one... Via overhead powerlines in your Region ) from electrical hazards load being lifted the... Unreasonable, make sure the load does not reduce the load does not the... What we 've done since day one 3 provides some information to other parties, such as or. Excavation work, establish a safe distance from any plant movement near excavation! And wet paint finishing service and chief executives to NZTA ’ s angle will depend site-specific! The key to risk management steps, review the information and make sure the materials are suitable the.