Frontline Manhole Guardrail* The manhole guardrail is 42" wide by 42" length to provide a comfortable working space and area for those entering the manhole. * The manhole guardrail includes a collapsible design for easy storage and or transportation. * Includes two safety chains for added protection for entrant supervisor and two steel opened loops to accommodate signage, safety flags, umbrellas, lights or the other different accessories to help with the confined space