- Part Number:1926
- Part Number Title:Safety and Health Regulations for Construction
- Subpart:1926 Subpart U
- Subpart Title:Blasting and the Use of Explosives
- Standard Number:
- Title:Firing the blast.
- GPO Source:
Before firing an underground blast, warning shall be given, and all possible entries into the blasting area, and any entrances to any working place where a drift, raise, or other opening is about to hole through, shall be carefully guarded. The blaster shall make sure that all employees are out of the blast area before firing a blast.
_________________________________________________________________________ TABLE U-1 _________________________________________________________________________ WARNING SIGNAL - A 1-minute series of long blasts 5 minutes prior to blast signal. BLAST SIGNAL - A series of short blasts 1 minute prior to the shot. ALL CLEAR SIGNAL - A prolonged blast following the inspection of blast area. _________________________________________________________________________