Surface Machinery and Methods for Oil-Well Pumping Page: 115
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MISCELLANEOUS OPERATING EQUIPMENT AND PRACTICE. 115
Every derrick and every derrick floor, walk, and platform shall be sub-
stantially constructed of structurally sound material to conform to standard
practice, and shall be kept in good repair.
DERRICK CROWN PLATFORMS AND RAILINGS.
On every platform hereafter constructed for drilling or equipped for re-
drilling, a platform at least 2 feet wide shall be provided around the edges
of the derrick crown. This platform shall be equipped on its outer edges
with a standard two-rail railing 3/2 feet high and a toeboard 12 inches high
above water table.
OUTSIDE DERRICK PLATFORMS FOR DRILLING RIGS.
A platform shall be provided completely around the derrick and level with
the quadruple board or with the principal working platform.
A platform shall be provided completely across the ladder side of the derrick
and level with each auxiliary platform other than the principal working plat-
The width of platforms shall be not less than 2 feet; platforms shall be
provided with openings to permit the passage of men climbing derrick ladders;
standard two-rail railings 31/2 feet high shall be provided around the outer
edges of platforms.
INSIDE DERRICK PLATFORMS.
Double (kelly) boards, triple boards, quadruple (fourble) boards and all
drill pipe or tubing platforms in derricks shall completely cover the spaces
from the working edges of the platforms back to the legs and girts of the
The decking planks on working sides of all platforms shall be secured to
derrick girts with U bolts or I bolts.
Fingers (finger boards) shall be secured to derricks by safety wires or cables
attached to outer ends of fingers.
The ginpoles at the crown of every derrick hereafter constructed or re-
constructed shall have two uprights and a crossbeam.
The clearance between the water table and the crossbeam shall be not less
than 7 feet.
AUXILIARY MEANS OF ESCAPE.
Auxiliary means of escape from the quadruple board, or the principal
working platform, and from the kelly board on every drilling and redrilling
derrick shall be provided either via a derrick guy line or by means of a
specially rigged life line from each of said working levels to the ground.
Unless a specially rigged life line has been provided, the guy line shall be
smooth and free of obstruction, so that in case of fire or other emergency
in or around a derrick, any employee whose escape has been cut off from the
regular passageways can reach the ground by sliding down the guy line.
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George, H. C. Surface Machinery and Methods for Oil-Well Pumping, report, 1925; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc12407/m1/150/: accessed February 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.