Mich. Admin. Code R. 408.15721 - Construction of derricks and masts
Rule 5721.
(1)
A derrick or mast manufactured after November 21, 1979, shall have a permanent
nameplate which is attached to the structure and which indicates all of the
following information:
(a) Name of
manufacturer.
(b) Model number and
serial number.
(c) Rating,
including maximum static hook load capacity with the number of lines.
(d) Whether guying is applicable and the
recommended guying pattern. If guying requirements do not appear on the
nameplates, the derrick or mast shall be guyed as prescribed by API SPEC
4E-1974, entitled "Specification for Drilling and Well Servicing Structures,"
which is herein adopted by reference and may be inspected at the Department of
Licensing and Regulatory Affairs, MIOSHA Standards Section, 7150 Harris Drive,
P.O. Box 30643, Lansing, Michigan, 48909-8143. The specifications may be
purchased at a cost of $125.00 from IHS Global, 15 Inverness Way East,
Englewood, Colorado, 80112, USA, telephone number: 1-800-854-7179 or via the
internet at website: http://global.ihs.com [File Link Not Available].
(2) An employee qualified in
procedures for raising and lowering the mast shall be in charge of raising and
lowering operations and shall do both of the following:
(a) Visually inspect the raising or lowering
mechanism.
(b) Assure that all
tools and materials which are not secured are removed from the mast.
(3) Only an employee required to
carry out the operation shall be allowed in or under the mast unless it is in
the fully raised or lowered position.
(4) The mast shall be level and properly
positioned before raising, lowering, scoping the structure, or tightening
guylines.
(5) Before imposing any
load on a derrick or mast, all required load guys shall be properly
tightened.
(6) Mast crown sheaves
shall be guarded to prevent the hoisting line from being displaced from the
grooves during all operations.
(7)
A derrick board or other platform shall be constructed, maintained, and
adequately secured to the structure to withstand the weight of employees and
other stresses placed upon the platform.
(8) An unguarded opening large enough to
permit a person to fall through shall not exist between the beams or main
supports of the crown block.
(9) If
bumperblocks are used under the crown block beam, a safety cable or strap shall
be fastened along their full length with both ends secured to the
derrick.
(10) All counterweights
above the rig floor, when not fully encased or running in permanent guides,
shall have a safety chain or wire rope safety line anchored to the derrick or
mast to secure them. The chain and wire rope shall be capable of sustaining the
drop load and shall limit the drop counterweight to not less than 7 feet from
the floor.
(11) Load-bearing
hydraulic jacks shall have a safety lock device, double valves, or the
equivalent..
(12) A derrick, mast,
and auxiliary parts shall be maintained in a safe condition.
Notes
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No prior version found.