Final answer:
The selection of trench shoring size and spacing is based on the trench's dimensions, with newer engineering practices suggesting greater distances between shoring members for increased safety.
Step-by-step explanation:
The selection of the size and spacing of shoring members in a trench is fundamentally an engineering problem that factors in the height and width of the trench. Historically, an older "rule of thumb" for the size and spacing suggested that shoring members be placed 5 diameters apart side-to-side and 7 to 8 diameters deep.
However, more recent studies and practices in the area of trench safety and engineering suggest a more conservative approach, recommending as much as 8 diameters apart side-to-side and 15 diameters deep for shoring members in trenches.
This increase in suggested spacing is likely due to newer research indicating that such distances offer greater stability and safety for the workers involved in trench work.
It is imperative that these guidelines are adhered to in order to prevent trench collapse, which can lead to serious injuries or fatalities. Advancements in the field of engineering have emphasized the importance of erring on the side of caution when developing such critical safety measures.
The complete question is:content loaded
Selection of size spacing of shoring meme era are based on height and width of trench