1910.1028 Benzene. (3) Sprockets on chain or slat-belt conveyors shall be enclosed. 14, 1988; 54 FR 24333, June 7, 1989; 61 FR 9240, Mar. If the validation organization has been recognized for more than one year, meets the requirements for expansion of recognition, and there is no evidence that the recognized validation organization has not been following the requirements of this appendix and the letter of recognition, an expansion will normally be granted. 1910.107 Spray finishing using flammable and combustible materials. If made of metal shapes or bars, their section shall be equal in strength to that of one and one-half (112) by one and one-half (112) by three-sixteenths (316) inch angle iron. (c) The safety distance (Ds) between each two hand control device and the point of operation shall be greater than the distance determined by the following formula: (d) Two hand controls shall be fixed in position so that only a supervisor or safety engineer is capable of relocating the controls. (ii) The motor start button shall be protected against accidental operation. (41) Knockout means a mechanism for releasing material from either die. (See paragraph (d)(6) of this section.). The hood shall be made of adequate strength to resist blows and strains incidental to reasonable operation, adjusting, and handling, and shall be so designed as to protect the operator from flying splinters and broken saw teeth. The sides of the lower exposed portion of the blade shall be guarded to the full diameter of the blade by a device that will automatically adjust itself to the thickness of the stock and remain in contact with stock being cut to give maximum protection possible for the operation being performed. (15) Pull-out device means a mechanism attached to the operator's hands and connected to the upper die or slide of the press, that is designed, when properly adjusted, to withdraw the operator's hands as the dies close, if the operator's hands are inadvertently within the point of operation. (2) Brake means the mechanism used on a mechanical power press to stop and/or hold the crankshaft, either directly or through a gear train, when the clutch is disengaged. (4) Arbors of all circular saws shall be free from play. The regular oilers shall wear tight-fitting clothing. (ii) Maximum hole size for cutting-off wheels should not be larger than 14-wheel diameter. Overhead rope drive and block and roller-chain-drive guards shall be not less than six (6) inches wider than the drive on each side. (17) Two hand control device means a two hand trip that further requires concurrent pressure from both hands of the operator during a substantial part of the die-closing portion of the stroke of the press. (1) Guards. (13) Control reliability. (ii) Fixed or permanent lead pot installations shall be exhausted. (2) Guard exposure angles. Blotters need not be used with the following types of wheels: (ii) Abrasive discs (inserted nut, inserted washer, and projecting-stud type). (a) The device may not be used on machines using full revolution clutches. (12) Guard design specifications. (iv) Light curtains used for PSDI operation shall have minimum object sensitivity not to exceed one and one-fourth inches (31.75 mm). The validation organization and validating laboratory shall have adequate administrative and technical staffs to conduct the validation of the certification of PSDI safety systems. A recognized validation organization may voluntarily terminate its recognition, either in its entirety or with respect to any area covered in its recognition, by giving written notice to OSHA at any time. (ii) All guards for inclined belts shall be arranged in such a manner that a minimum clearance of seven (7) feet is maintained between belt and floor at any point outside of guard. (vi) It shall be the responsibility of the employer to ensure the competence of personnel caring for, inspecting, and maintaining power presses equipped for PSDI operation, through initial and periodic training. (4) If there is a counterweight, one of the following or equivalent means shall be used to prevent its dropping: (i) It shall be bolted to the bar by means of a bolt passing through both bar and counterweight; (ii) A bolt shall be put through the extreme end of the bar; (iii) Where the counterweight does not encircle the bar, a safety chain shall be attached to it; (iv) Other types of counterweights shall be suspended by chain or wire rope and shall travel in a pipe or other suitable enclosure wherever they might fall and cause injury. (xvii) Controls with internally stored programs (e.g., mechanical, electro-mechanical, or electronic) shall meet the requirements of paragraph (b)(13) of this section, and shall default to a predetermined safe condition in the event of any single failure within the system. 2. The hazard created by a guide post (when it is located in the immediate vicinity of the operator) when separated from its bushing by more than one-fourth inch shall be considered as a point of operation hazard and be protected in accordance with paragraph (c) of this section. 1910.110 Storage and handling of liquefied petroleum gases. (ii) Two-hand trip systems on full revolution clutch machines shall incorporate an antirepeat feature. 2. Work rests shall be kept adjusted closely to the wheel with a maximum opening of one-eighth inch to prevent the work from being jammed between the wheel and the rest, which may cause wheel breakage. To avoid electric shock or electrocution, all equipment must be properly wired and grounded according to electrical codes. (4) Where practicable, hand and footpower guillotine veneer cutters shall be provided with rods or plates or other satisfactory means, so arranged on the feeding side that the hands cannot reach the cutting edge of the knife while feeding or holding the stock in place. If the belt is of the endless type or laced with rawhide laces, and a belt shifter is not desired, the belt will be considered guarded if the nip point of the belt and pulley is protected by a nip point guard located in front of the cone extending at least to the top of the largest step of the cone, and formed to show the contour of the cone in order to give the nip point of the belt and pulley the maximum protection. Such supplemental safeguarding shall consist of either additional light curtain (photo-electric) presence sensing devices or other types of guards which meet the requirements of paragraphs (c) and (h) of this section. (C) A check shall be made to determine that all supplemental safeguarding is in place. (C) The air pressure supply for clutch/brake valves on machines used in the PSDI mode shall be regulated to pressures less than or equal to the air pressure used when making the stop time measurements required by paragraph (h)(2)(ii) of this section. All mills irrespective of the size of the rolls or their arrangement (individually or group-driven) shall be stopped within a distance, as measured in inches of surface travel, not greater than 112 percent of the peripheral no-load surface speeds of the respective rolls as determined in feet per minute. (1) Boltheading. Grinding machines shall be equipped with flanges in accordance with paragraph (c) of this section. (11) Band type guards - general specifications. Pulleys, any parts of which are seven (7) feet or less from the floor or working platform, shall be guarded in accordance with the standards specified in paragraphs (m) and (o) of this section. The clearance between the edge of the rear table and the cutter head shall be not more than one-eighth inch. The eCFR is displayed with paragraphs split and indented to follow (7) Circular saw gages shall be so constructed as to slide in grooves or tracks that are accurately machined, to insure exact alignment with the saw for all positions of the guide. 1910.1011 4-Aminodiphenyl. Displaying title 29, up to date as of 3/02/2023. 1910.1029 Coke oven emissions. They may be steel centered, diamond abrasive or organic bonded abrasive of the plain or reinforced type. The validation organization or validating laboratory shall have a follow-up system for inspecting or testing manufacturer's production of design certified/validated PSDI safety system components and subassemblies where deemed appropriate by the validation organization. An open space, not exceeding four (4) inches in width, may be left between the outside edge of the disk and the rim of the wheel if desired, to facilitate turning the wheel over. (h) Modified types 6 and 11 wheels (terrazzo). 3 Slenderness ratio formula for short columns is L/d = 11, where L = length of timber in inches and d = least dimension in inches; this ratio should not exceed 11. (3) Feed rolls of band resaws shall be protected with a suitable guard to prevent the hands of the operator from coming in contact with the in-running rolls at any point. 1. Similarity analysis should not be accepted when the internal and external stresses on the item being certified/validated are not defined. The fourth regulation in OSHA standard 1910.178(g) requires a "conveyor, overhead hoist, or equivalent material handling equipment" to assist workers in moving forklift batteries. The guard shall automatically adjust itself to cover the unused portion of the head and shall remain in contact with the material at all times. This exposure shall begin at a point not more than 65 above the horizontal plane of the wheel spindle. Enhanced content is provided to the user to provide additional context. (i) The control system on presses used in the PSDI mode shall meet the applicable requirements of paragraphs (b)(7), (b)(8), (b)(13), and (c)(5) of this section. Abrasive wheels shall be used only on machines provided with safety guards as defined in the following paragraphs of this section, except: (i) Wheels used for internal work while within the work being ground; (ii) Mounted wheels, used in portable operations, 2 inches and smaller in diameter; and. 6.a. Pulleys with cracks, or pieces broken out of rims, shall not be used. Every saw shall be provided with a guard of not less than one-eighth inch sheet metal positioned to stop flying sparks. 1910.1096 Ionizing radiation. All drip cups and pans shall be securely fastened. (55) Trip or (tripping) means activation of the clutch to run the press. Malleable iron (min. 1910.216 Mills and calenders in the rubber and plastics industries. (3) Type 6 straight cup wheels means wheels having diameter, thickness, hole size, rim thickness, and back thickness dimensions. Each manufacturer supplying parts, components, subsystems, and assemblies needs to maintain the quality of the product, and each employer needs to maintain the system in a non-degraded condition. 1910.333 Selection and use of work practices. They shall be designed to provide adequate holding power for all the thicknesses of materials being cut. c. Function completion means for, electrical, electromechanical and electronic devices, when the circuit produces a change of state in the output element of the device. 1910.146 Permit-required confined spaces. (1) Determination of distance of travel. Tongs shall be of sufficient length to clear the body of the worker in case of kickback, and shall not have sharp handle ends. These tests shall specify the acceptable tolerance band sufficient to assure that tolerance build-up will not render the safety distance unsafe. The employer shall evaluate and test the PSDI safety system installation, shall submit to the OSHA-recognized third-party validation organization the necessary supporting documentation, and shall recertify that the requirements of 1910.217(a) through (h) and this appendix are being met. (5) Excluded machines. (52) Stop control means an operator control designed to immediately deactivate the clutch control and activate the brake to stop slide motion. Integrated test of the press fully equipped to operate in the PSDI mode shall be conducted to establish the total system reaction time. The explanation and use of the scale shall be documented. 1910.334 Use of equipment. It is not an official legal edition of the CFR. The certification/validation process shall verify that the safety system complies with the OSHA safety requirements as follows: 1. Ts = Longest press stopping time, in seconds, computed by taking averages of multiple measurements at each of three positions (45 degrees, 60 degrees, and 90 degrees) of crankshaft angular position; the longest of the three averages is the stopping time to use. 1910.1050 Methylenedianiline. (ii) Tap wheels about 45 each side of the vertical centerline and about 1 or 2 inches from the periphery as indicated by the spots in Figure O-25 and Figure O-26. If the preliminary decision is in favor of recognition, a member of the public, or if the preliminary decision is against recognition, the applicant may request a public hearing by the close of the comment period, if it supplies detailed reasons and evidence challenging the basis of the Assistant Secretary's preliminary decision and justifying the need for a public hearing to bring out evidence which could not be effectively supplied through written submissions. It shall be of sufficient width to provide adequate stiffness or rigidity to resist any reasonable side thrust or blow tending to bend or throw it out of position. (2) At the rear ends of frames over which feed conveyors run, sprockets and chains shall be guarded at the sides by plates projecting beyond the periphery of sprockets and the ends of lugs. No one should ever climb over or crawl under a conveyor and NEVER ride on or otherwise use a conveyor for transportation. (15) Combs (featherboards) or suitable jigs shall be provided at the workplace for use when a standard guard cannot be used, as in dadoing, grooving, jointing, moulding, and rabbeting. Full stop or No movement of the slide or ram means when the crankshaft rotation has slowed to two or less revolutions per minute, just before stopping completely. (vii) Reactivation of PSDI operation following deactivation of the PSDI mode from any other cause, such as activation of the red color stop control required by paragraph (b)(7)(ii) of this section, interruption of the presence sensing field, opening of an interlock, or reselection of the number of sensing field interruptions/withdrawals required to cycle the press, shall require resetting of the set-up/reset means. All power-transmission equipment shall be inspected at intervals not exceeding 60 days and be kept in good working condition at all times. In lieu of such yielding sectional rolls, suitable section kickback finger devices shall be provided at the infeed end. (iv) If pedal counterweights are provided, the path of the travel of the weight shall be enclosed. EN 618:2002+A1:2010, Continuous handling equipment and systems - Safety and EMC requirements for equipment for mechanical handling of bulk materials except fixed belt conveyors EN 619:2002+A1:2010, Continuous handling equipment and systems - Safety and EMC requirements for equipment for mechanical handling of unit loads Such changes in operational conditions as die changes or press relocations not involving disassembly or revision to the safety system would not require recertification/revalidation.). (32) Guard means a barrier that prevents entry of the operator's hands or fingers into the point of operation. When repairing or cleaning a conveyor, all equipment must be locked or blocked and operating controls tagged. Belt shippers and shipper poles. However, the guarding of these gears is highly recommended. (5) Modified types 6 and 11 wheels (terrazzo) mean some type 6 and 11 cup wheels used in the terrazzo trade having tapered K dimensions to match a special tapered flange furnished by the machine builder. (ii) The PSDI mode shall not be used for die setting or set-up. 1910.424 SCUBA diving. The certification/validation of safety systems for PSDI shall consider the press, controls, safeguards, operator, and environment as an integrated system which shall comply with all of the requirements in 29 CFR 1910.217 (a) through (h) and this appendix A. means the distance in feet any one abrasive grain on the peripheral surface of a grinding wheel travels in 1 minute. Appendix B to Subpart I of Part 1910Nonmandatory Compliance Guidelines for Hazard Assessment and Personal Protective Equipment Selection (7) Environmental requirements. above floor level. (v) Air counterbalance cylinders shall incorporate means to prevent failure of capability (sudden loss of pressure) in event of air supply failure. Expanded metal, perforated or solid sheet metal, wire mesh on a frame of angle iron, or iron pipe securely fastened to floor or to frame of machine. If the supplemental guards are moved, the presence sensing device would become misaligned and the press control would be deactivated. 7, 1996]. (59) Control system means sensors, manual input and mode selection elements, interlocking and decision-making circuitry, and output elements to the press operating mechanism. For design certification, in the first stage, the manufacturer (which can be an employer) certifies that the PSDI safety system meets the requirements of 29 CFR 1910.217 (a) through (h) and this appendix A, based on appropriate design criteria and tests. b. (5) Each wood jointer with vertical head shall have either an exhaust hood or other guard so arranged as to enclose completely the revolving head, except for a slot of such width as may be necessary and convenient for the application of the material to be jointed. Filing office location. (7) Feeder attachments shall have the feed rolls or other moving parts so covered or guarded as to protect the operator from hazardous points. The safety guard shall cover the spindle end, nut, and flange projections. These bars shall operate readily by pressure of the mill operator's body. Where a mill is so installed that persons cannot normally reach through, over, under, or around to come in contact with the roll bite or be caught between a roll and an adjacent object, then, provided such elements are made a fixed part of a mill, safety control devices listed in paragraph (b) of this section shall not apply. 1910.94 Ventilation. 1910.219 Mechanical power-transmission apparatus. The third-party validation organization, the validating laboratory, and the employees of each shall meet the requirements set forth in this section of this appendix. Design certification/validation for a new safety system, i.e., a new design or new integration of specifically identified components and subsystems, would entail a single certification/validation which would be applicable to all identical safety systems.
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