Page 277 - Safety Memo

6. Temperature, illumination, sanitation, and ventilation as Ramps and Runways
per 6100. Ventilation in the locks and chambers, with the
exception of the medical chamber, shall be such that the Regulations concerning ramps and runways are as follows:
air quality meets the requirement of section 5144(i).
Ventilating air shall be not less than 30 cubic ft. per A. General requirements
minute per person. 6100 1. Ramps must be properly designed to provide a safe
7. Providing forced ventilation during decompression to means of access for foot or vehicle traffic.
ensure a source of fresh air. 6100(f) 1623, 1624, 1625
8. Taking one or both of the following steps when 2. Open sides of ramps that are 7 1/2 ft. or more above
an oxygen breathing gas system is used during ground must have standard guardrails. 1621(a)
decompression, to ensure that the concentration of B. Foot ramps
oxygen inside the chamber or lock does not exceed
twenty five percent (25%) by volume: 6100(i) 1. Foot ramps must be at least 20 inches wide and must
be secured and supported to avoid deflection or
a. The oxygen breathing gas system shall capture the springing action. 1624(a)
oxygen that is not consumed by the user and directly
exhaust it to a well-ventilated area outside of the lock 2. If the ramp slope exceeds 2 ft. of rise for every 10 ft. of
or chamber. run, cleats must be 8 inches or more in length and must
be placed not more than 16 inches apart. 1624
b. An oxygen meter shall be used to continuously
monitor the oxygen concentration inside the chamber C. Wheelbarrow ramps and runways
or lock. 1. Wheelbarrow ramps and runways must be firmly secured
9. Retaining a supervising physician who shall be against displacement. 1624(c)
available at all times while pressurized work is in 2. Ramps more than 3 ft. high must be 30 inches wide,
progress in order to provide medical supervision of and planks must be firmly cleated together. 1623
employees employed in compressed air work. 6120
3. Falsework design loads must be increased by 10 psf for
10. Following fire prevention and oxygen safety requirements worker-propelled carts. 1717(a)
as specified in 6115.
C. Employees who are exposed to or control the exposure of
others to hyperbaric conditions shall be trained in hyperbaric Roofing Operations
related physics and physiology, recognition of pressure
related injuries, and how to avoid discomfort during Working conditions at roofing projects are often difficult and
compression. 6075 continuously expose workers to serious hazards. In California,
one of the most common causes of work-related deaths is falls
from roofs. Injuries common to the roofing industry include (1)
Qualified Person broken bones because of falls; (2) back injuries because of
awkward postures and heavy lifting; and (3) burns from contact
A qualified person is a person designated by the employer, with hot roofing asphalt and associated equipment.
and who by reason of training, experience, or instruction has
demonstrated the ability to perform safely all assigned duties; Roofing operations are classified as either single-unit or multi-
and, when required, is properly licensed in accordance with unit. Examples of single-unit (monolithic) roofing are built-up
federal, state, or local laws and regulations. 1504 The CSOs roofing, flat-seam metal roofing, and vinyl roofing. Examples of
refer to a Qualified Person in several of the regulations. multi-unit roofing are asphalt shingles, cement, clay and slate
tile, standing seam metal panels, shingle metal roofing, and
wood shingles.
Employees shall be protected from falls from roofs. The
following regulations aim to minimize or eliminate the hazards

112 Cal/OSHA Pocket Guide for the Construction Industry | June 2019 Cal/OSHA Pocket Guide for the Construction Industry | June 2019 113