16. HDPE Installation High-density polyethylene (HDPE) is an extremely versatile material that is utilized for a number of engineering works. As one of the most versatile plastic materials around, HDPE plastic is used in a wide variety of applications, including plastic bottles, milk jugs, shampoo bottles, bleach bottles, cutting boards, and piping. Known for its […]
15. Grit Blasting (Sand Blasting) Abrasive grit blasting (also commonly known as abrasive blasting or sandblasting) involves forcibly propelling an abrasive material against a surface under high pressure. Different variants of the blasting process involve different media, which range in their levels of abrasiveness, with some being highly abrasive while others are very mild in effect. The most abrasive methods include shot blasting (which uses metal shot) and sandblasting. ∴ ∴ Hazard Category Hazards Controls Foreign Bodies in Eyes 1. With the
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14. Grinding (그라인더 사용) Grinding is the process of removing metal by the application of abrasives which are bonded to form a rotating wheel. When the moving abrasive particles contact the workpiece, they act as tiny cutting tools, each particle cutting a tiny chip from the workpiece. ∴ ∴ Hazard Category Hazards Controls Particles in The Eye 1. Can occur through attempting to lift.
13. Grating Installation The steel grating can be installed and fixed in many ways. Typically, welding installation, fastener fixing and angle steel fixing are three methods we commonly used for steel grating installation. ∴ ∴ Hazard Category Hazards Controls Falls of Materials/ Tools 1. Can occur by hand materials and tools, etc. Being accidentally dropped through the gratings
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12. Gas Cutting The process consists of preheating the metal to be cut to its ignition (oxidation) temperature, i.e., above 870°C in case of steel. The preheating is done by oxy- acetylene gas flame, which is supplied from surrounding openings of the cutting torch. When this temperature is attained, a jet of high pressure oxygen
11. Fire Proofing by Spraying Many building codes require fireproofing protection to structural steel as a safety precaution. The most common way to provide such protection is by spraying low-density fiber or cementitious compounds, now called spray-applied fire-resistive material (SFRM). The product can be sprayed on steel to provide heat resistance and also can be
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10. Excavation Work Being a major part of the site preparation, excavation can make or break the stability of your future building. First things first. Do not commence any excavation work before you have a clear map of underground utilities: cables, pipes, etc. Mark the services and make sure everyone in the excavation team knows
09. Electrical Testing It is more likely that this will happen during electrical testing and fault finding, when conductors at dangerous voltages are often exposed. You can minimise this risk if testing is done while the equipment is isolated from any dangerous source of supply, although this is not always possible. Take care to prevent
08. Electrical Installation Electrical installations consist as the connection system that has the mission to conduct and distribute the electric current, from the electric service to the last electrical installation outlet, in a edification or construction. Electrical installation describes the physical work involved in installing electrical systems into a building and a plant., etc as
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07. Coring on Existing Drainage Sump. Constructing holes in precast concrete manhole sections for pipe connections can be achieved by several methods. Each requires careful consideration before making the investment in training and equipment. Whether you are building a new plant and trying to decide which production method to use or you have an existing
07. Coring on Existing Drainage Sump. 더 읽기"
06. Cable Pulling, Installation and Banding Cable pulling works involve an individual pulling sheathed cables through walls, trays and ducts for electrical power systems. They will push, pull, and band these cables through given spaces, as well as joining them together. ∴ 케이블 풀링, 설치 공사는 혼자하기 어려운 작업입니다. 한팀을 이루어 작업을 진행하고, 풀링할 때에 구호를 넣어 구호에 맞춰 케이블을 끌어당기고 고정하기도 합니다. 케이블을
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05. Bolt Tightening and Torquing [General Information] Bolts may seem simple, but in reality the proper manufacturing of bolted joints requires careful study. Tightening the bolt puts the shank in tension, counteracted by compressive forces on the contact surfaces of the head and the nut, transferred from the parts. Inadequate preload is a common cause for bolted
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04. Backfilling Work Excavation and backfilling of soil is a very important part of construction process, and care must be taken while excavation in safety perspective. Different soil layers may be encountered while excavation, dewatering may be needed sometimes. These points must be kept in mind to take necessary action during excavation and backfilling. ∴
03. Asphalt Works Asphalt paving works is a composite material commonly used to surface roads, parking lots, airports and other such places. It lays the asphalt flat and provides minor compaction before it is compacted by a roller. ∴ 아스팔트 공사하는 모습을 운전하시면서 종종 보셨을 거예요. 많은 건설장비가 투입되어 장비사고 위험이 높습니다. 사용 중인
Air flushing provides an efficient method of removing debris from pipelines and newly constructed systems. ∴ In the gas process lines, the velocity should be the lowest figure between 60 m/s and the velocity obtained at 1.3 time the maximum process flow rate. The minimum velocity should be 30 m/s. In liquid process lines, a
01. Air Blowing Test Air Blowing can be used as a safer, more environmentally friendly and cost effective alternative to conventional cleaning and steam blowing. The purpose of air blowing is to remove loose scale and debris prior to start up using compressed air as the cleaning medium. The velocity of a large air mass
A Job Safety Analysis (JSA), also known as a Job Hazard Analysis(JHA), is to identify hazards before they occur. It is on the relationship between workers, tasks, equipment, devices and working environment. After you identify uncontrolled hazards, you should carry out four steps to eliminate or reduce it to an acceptable risk level. ∴ 1. Select
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https://news.kbs.co.kr/news/view.do?ncd=7701468&ref=D “10층 높이에 맨몸으로”…대기업 건설현장도 ‘아찔’ [현장K] [앵커] 지난달, 롯데건설이 시공하는 아파트 재건축 현장에서 한 노동자가 숨졌습니다. 7미터 높이에서 떨… news.kbs.co.kr 뉴스를 보시면 알다싶이 맨몸으로 철골을 누비고, 크레인 후크를 타고 사람이 엘리베이터를 이용하듯 내려오고, 아파트 갱폼에서 난간, 발판이 없이 호퍼 작업을 하고 있습니다. 아직도 이렇게 일하는 곳이 있네요. 안타깝습니다. 노동자는 안전 장치 하나 없이 사다리를
“10층 높이에 맨몸으로”…대기업 건설현장도 더 읽기"
23년 4월 29일 오후 인천 검단신도시의 AA13-2블록 아파트 건설 현장에서 지하 주차장 1~2층 상부 구조물이 무너지는 사고가 발생했습니다. 당시 사고로 인한 인명피해는 없었으나 지하 주차장 2개층 지붕 구조물 총 970m2가 파손되었습니다. 이 공사는 GS건설이 한국토지주택공사(LH)로 부터 시공책임형 건설사업관리(CMR)방식으로 수주한 건으로 CMR방식은 설계 단계부터 시공사를 선정,참여시켜 시공사의 책임하에 약정 된 공사비 내에서 공사를 시행하는 것입니다. GS건설은
23.04.29 검단 신도시 아파트 신축공사 붕괴 사고 – 지하주차장 더 읽기"
울산 남구의 한 아파트 공사현장에서 항타기가 전도되어 인근 건물을 덮치는 사고가 발생했습니다. 토목공사 중 파일기초공사에 사용되는 항타기는 이동 중 또는 작업 중 전도되는 사고가 발생되고 있습니다. 뉴스 기사를 통해서 어떤 사상자나 재해자가 발생되지는 않은듯 싶습니다. 하지만 워낙 무거운 건설장비이기 때문에 인근 피해 건물은 3개동은 안전진단을 받아야 할 것 같습니다. 2020년에는 인천공항고속도로 근처 현장에서 항타기가 무너지면서
