What should construction companies do to protect trench workers?
What should construction companies do to protect trench workers?
Author: Shebell & Shebell, LLC
Date: December 27, 2019
Category: Blog
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Construction trenches are a vital part of maintaining our infrastructure and are used to access or construct gas lines, water mains, telephone lines, and underground pipes. Trenches are dug by excavation workers. They can be as wide as 15 feet at the bottom of the excavation and can be more than 20 feet deep.
When trench worksites are set up correctly and fully inspected, they generally allow for safe work conditions. Some construction companies, however, fail to take critical safety measures in order to cut costs and time. This puts workers at risk of being seriously injured or even killed.
Generally, how safe are trench workers?
According to Occupational Health & Safety, there were just as many construction fatalities in trenches during 2016 as there were during 2014 and 2015 combined. The booming economy, increasing infrastructure, and lack of trench safety awareness are cited as leading factors. From 2011-2016, approximately 38 percent of construction fatalities occurred in industrial locations, another 30 percent in residential locations, and 20 percent on streets and highway sites. Many of these deaths occurred due to trench collapses or other accidents occurring in trenches.What are the safety requirements for trenches?
According to the Occupational Safety and Health Administration (OSHA), protective systems are required for construction trenches that are five feet deep or more. For trenches 20 feet or more, protective systems must be:- Designed by a professional engineer, or
- Be based on tabulated data prepared by and/or approved by a registered professional engineer
- Benching: Protects workers from cave-ins by forming horizontal levels or steps along the sides of a trench.
- Sloping: Trench walls are cut at an incline angle to prevent walls from collapsing.
- Shoring: Involves aluminum hydraulic support to stop soil from moving.
- Shielding: Uses box-like structures to prevent cave-ins.
Who is responsible for ensuring that trench sites are safe?
Trenches must be evaluated by a competent person on a daily basis, or each time a new worker enters or conditions of the job site change. Additionally, a competent person must evaluate:- The soil type of a trench site
- The weather conditions
- Nearby above-ground utility lines
- Nearby structures such as proximity of building, railroads, and other underground lines and pipes
- Surface and groundwater
- The construction equipment, materials, and tools used at a trench site