A competent person is a person who has acquired through training, qualification or experience the knowledge and skills to carry out a task. 0000032959 00000 n 0000002581 00000 n The National Colour Coding System for underground utilities are: Red – Electric power lines, conduit and cables. shared workplace (eg a building site), where more than one PCBU and its workers control and influence the work on site. 1.5 m or more deep, provide ladder or stairway access and egress. This colour has spiritual importance to the Māori by whom it is known as kōkōwai. We are your underground service installation professionals. This guidance will be progressively reviewed and either updated, replaced with other guidance, or revoked. Sheet piles are available in various lengths, thicknesses and profi les and interlock to provide a continuous wall. Sheeting is overlapping rather than interlocking, and cannot stand on its own. Otherwise, a competent person should design the shoring for the specific workplace conditions. These are the minimum issues to consider. Various plant and equipment can carry out excavation work. (d) is not altered, dismantled, or interfered with except on the instructions of the employer or a representative of the employer. WE KNOW THE DRILL. If shoring is impracticable or unreasonable, make sure a competent person certifies any other safety precautions put in place as adequate. A notifiable event is when someone dies or when a notifiable incident, illness or injury occurs as a result of work. Underground electrical cables can be particularly hazardous because they often look like pipes and it is impossible to tell if they are live just by looking at them. For example, placing spoil near the excavated face may cause it to collapse. workplace changes may impact on the effectiveness of controls > new or different risks are associated with a change in work systems or work location. 0 (d) any such excavation created in the course of the work is covered, fenced, or filled at the completion of the work. 0000021834 00000 n Shafts and drives are often constructed to provide access or ventilation to a tunnel. They have often been referred to as survey color codes, survey flag colors, color codes for underground concrete, utility location pain codes and utility locate color system. GPS MAPPING . Think about the root cause of any harmful event, the likelihood it will occur, the consequences if it does and the steps to take to eliminate or minimise the risk. 0000033474 00000 n 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). Avoid striking or undermining services. In the first instance, contact the service owner for advice prior to works commencing. Quick hitches allow a bucket or other attachment to be quickly and easily connected and disconnected from an excavator or backhoe arm, saving signifi cant time during mobile plant operation. All three systems work best in poor ground conditions such as loose sands, gravels, and soft cohesive clays. an oxygen concentration outside the safe oxygen range, a concentration of airborne contaminant that may cause impairment, loss of consciousness or asphyxiation, a concentration of flammable airborne contaminant that may cause injury from fire or explosion. Mapei New Zealand Ltd., 30 Fisher Crescent, Mt Wellington, Auckland 1060, New Zealand Phone +64 9 921 1994 Fax +64 9 921 1993 Email enquiries@mapei.co.nz This website uses cookies to improve your browsing experience. Ground anchors (sometimes referred to as ‘tie-backs’) alone do not support an excavation, they form part of a larger shoring system, typically with steel sheet piling. For more information see WorkSafe’s special guide Introduction to the Health and Safety at Work Act 2015. PVC ducts provide a simple way of safeguarding underground electrical cables using traditional installation methods. Weather Underground provides local & long-range weather forecasts, weather reports, maps & tropical weather conditions for locations worldwide Make sure to engage with workers carrying out the excavation work and their representatives, and if you are working with other PCBUs, co-operate, co-ordinate and consult with them so far as is reasonably practicable. Hours. Our mission is to build a utility locating industry that sets a global benchmark for capability, best practice, and innovation. Risk management involves thinking more broadly about risk, not just spotting work-related hazards. Underground cables. Remove shoring and all supports in a way that protects workers from ground collapse, structural collapse, or being struck. Table 7: MADs to excavate with mobile plant (9). About Services Projects Contact REQUEST FORM About Services Projects. The soil should be above the static groundwater level, or have been dewatered. any shoring or excavation support requirements. 0000033064 00000 n local authorities, by-laws and district plans. 0000034189 00000 n A competent person should design any timber shoring conforming to the timber sizes and grades specified in Table 6. what ways are suitable to eliminate or minimise the risk. any effects of the excavation on nearby structures, Shored,(2) benched and/or battered (eg shored) as per table 6), Recent experience in carrying out or supervising excavation work at these depths, Technical or trade qualification (eg as a civil engineer or drain layer), Recent experience in carrying out or supervising, excavation work in similar ground at these depths, Experienced temporary works designer(3) able to interpret the site's soil information, Experienced temporary works designer (2) able to judge whether it is safe, Can provide producer statements: PS1-design, and PS4-construction review, someone who has industry training and expertise, experience, knowledge and skills to excavate to this excavation’s depth and type. 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