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Includes ballast cleaning machine operators and railroad bed tamping machine operators. May assist conservation scientists in managing, improving, and protecting rangelands and wildlife habitats. Coordinate activities in resident facilities in secondary and college dormitories, group homes, or similar establishments. Research market conditions in local, regional, or national areas, or gather information to determine potential sales of a product or service, or create a marketing campaign. Great guide to understand what you can do with EO! Minimum "cab skin" plate size shall be 11 ga to 16 ga depending on the size of intermediate stiffeners used. Researchers still need to work out details of a process to produce strong, uniformly sintered material in the harsh lunar environment.
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The symbol "W" represents weight of the heaviest log expected to be handled by the log yarder or loader. The following formula may be used to compute the expected weight of incoming logs:.
Scope This standard pertains to log loaders and log yarders, and other mobile equipment where the operator is exposed to the hazard of intruding or flying objects, such as snapped or whipping cables, loose debris and tree limbs. It is supplementary to other WCB Standards for operator's guards:.
The scope and guidelines of each of the above standards shall be correctly interpreted and proper judgement made in determining their appropriate application.
Purpose This standard is intended to describe the minimum requirements for the design and selection of rod-size, framework and supports for guards over window areas of operator's cabs.
It may also be applicable to other openings such as doorways in certain circumstances. Such structural parts shall be adequately designed and constructed to resist all loads imposed on them by the Guard. Each grid opening shall not be greater than 64 square inches cm 2.
Location Guards shall be installed in front of all window areas exposed to flying or intruding hazards. All guards shall be positioned at least 4 inches 10 cm and not more than 8 inches away from the glazed windows or exterior faces of the cab. Grid element rod sizes shall be proportionately increased as the dimension of the guard increases. Minimum edge beam size shall be determined in accordance with 2. Materials with equal or better properties may be used in place of those stipulated in this Standard.
Scope This standard pertains to equipment such as tractors, loaders, skidders, where screen type guards are required to protect operators against flying or intruding objects.
The guards are intended to resist the penetration by flying or intruding objects or materials into the critical zone which is defined as the Deflection Limiting Volume DLV in the SAE Recommended Practice Ja for off-highway equipment.
Purpose This standard is intended to describe requirements for the design of supports and framework, and selection of screen material pertaining to light-duty screen guards. Back screen guard shall be provided in the area behind the operator. Side screen guard shall extend forward from the back screen guard to at least the forward edge of the operator's seat and shall extend vertically to at least the full height of operator's control area ROPS or canopy. The screen should not obstruct or restrict the operator's egress from his control area.
Front screen guard, where necessary and applicable, shall be provided in front of the operator's control area. Design and Fabrication Requirements for Supports 3. Woven, welded wire mesh or other materials of equivalent or better strength properties are acceptable.
Minimum Design Criteria The following design criteria may be used in lieu of the recommended sizes and dimensions:. All components of the Screen Guard and Supports shall be made of material with good impact absorbing characteristic which is assisted by:.
To guard a 32" x 48" area against flying or intruding object. Project down and read corresponding Wu which is 19". Increase wire mesh size to 1 ga. For simplicity in fabrication, use 1" dia. Protective screens installed under this Standard will not provide complete protection for equipment operators who are sometimes also exposed to such hazards as flying jaggars or other injurious particles which may be projected through the openings of such protective screens.
Where such additional hazard exists, it is recommended that the operators be further protected from such flying or intruding objects by the provision of transparent protective shields so mounted on the screens that they can be readily accessible for cleaning without undue impairment to the operator's vision.
The grazing materials used in the make-up of the protective shield should have such properties as good luminous transmittance, cleanability and resistance to abrasion, impact, solvents and weather conditions.
This framework consists of. Intermediate supports have been added to conform to the standard G Please note the structure shown is not a ROPS. Scope This standard pertains to any rubber-tired skidders employed in the skidding of logs or tree lengths where the operator may be exposed to flying or other intruding objects. Purpose This standard is intended to describe the minimum requirements for the design and selection of structural elements such as plates, stiffeners, sheer deflectors, spring latches or hinges for the half-door.
General Location A half-door shall be installed on both side entrances to the control area. Recommended opening width is 70 cm 27 inches. Character Distinctive Qualities 2. It shall sweep outward from the cab.
Also, a latch, preferably of pressure sensitive type should be used to lock the door. The entire door assembly shall be designed to resist a static force of N 4, lbs. This is contingent on approval by a registered professional engineer.
Impact Strength Requirement All members of the half-door shall be fabricated of material with good impact absorbing properties. Scope This standard pertains to any vessel used to push or pull logs, booms, bundles or bags in booming ground operation where the operator may be exposed to collision with water-borne logs. Examples of such vessels are dozers, side winders, boom scooters and tugs. Purpose This standard is intended to describe the minimum requirements for the design and selection of window guards, plates, framework and supports for a cab which will form and provide a protective structure for the operator occupying same.
The following points are stated to clarify the underlying principles and assumptions of this standard. The stiffness of the vessel is assumed to be in direct proportion to W x GM x SIN q were W is the weight of vessel, GM is the metacentric height, and q is the angle of heel. The stiffness of the operator protective structure is assumed to be very much higher than the vessel's heeling resistance.
Hence the stiffness of the entire system is approximately equal to the heeling resistance of the vessel. It is assumed that the elements of the operator protective structure would be arranged in such a way to elastically deflect the projectile rather than arresting its motion. The derivation of the peak collision force is based on linear elastic collisions. It is a minimum requirement for the protective structure to have a "crush protection design capability" to withstand the force exerted on it by a hypothetical blunt log 1 m x 12 m 3 feet x 40 feet striking end-on at a velocity of 1.
The operator protective structure can be an integral part of a cab or it can be a "cage" outside an existing structure. Frame All frame members of the cab protective structure shall be designed to resist the applied load in accordance with clause 3. Cab Skin All exposed unguarded sides of the cab shall be protected with metal plates or other suitable material. They shall be designed to resist the force as defined in clause 3.
Supports The cab protective structure shall be secured to the structural parts of the vessel. Such structural parts shall be adequately reinforced to resist the loads imposed on them by the cab protective structure. Fastenings If bolts and nuts are used in the fabrication of the guard, they shall conform to or exceed the ASTM designation A requirements.
All such view areas shall be guarded by vertical members spaced at intervals of not more than 6 inches. These vertical members shall be designed to assist the force as defined in clause 3. If flat bars are used as vertical elements, they should be in a radiating pattern to minimize interference with the operator's line of sight. Weldment Weldments shall conform to the applicable sections of general specifications for welding of steel structures, CSA W Such exit shall have a minimum clear opening of 60 cm 24 inch diameter.
Glazing optional Only safety glass or other suitable material with similar shatter-resistant characteristics shall be used for window areas and such glazing materials shall be positioned at least 20 cm 4 inches away from the window guard.
The following recommended sizes and dimensions may be used in lieu of the design load criteria, clause 3. Grid element size shall be proportionately increased as the dimension of the guard increases. Minimum column size shall be 3 x 3 x 0. Minimum "cab skin" plate size shall be 11 ga to 16 ga depending on the size of intermediate stiffeners used. Scope This standard pertains to front end log loaders - mobile machines mounted on a wheeled or tracked chassis, equipped with a front mounted grapple, tusk, or fork-lift device and employed in the loading, unloading, stacking, sorting or handling of logs, used only in dry land sorting areas.
Purpose This standard is intended to describe the minimum requirements for the design and selection of rod-size, framework and supports for guards over window areas of operator's cab.
Front screen guard shall be provided in the area in front of the operator and shall at least extend the full height of all glazing surfaces. Rear screen guard, where necessary and applicable, shall be provided in the area behind the operator. All guards shall be positioned at least four inches away from the glazed windows. There should be at least three vertical elements. Such structural parts shall be adequately designed and constructed to resist all loads imposed on them by the guards.
On the front end loaders equipped with a rollover protective structure ROPS , the screen guards may be attached to parts of the ROPS, provided that such attachment does not adversely affect the performance of the ROPS.
All such attachments shall be clamped unless welding is permitted by the ROPS manufacturer or a registered professional engineer. Visibility Requirement Minimum interference with operator's visibility shall be one of the governing criteria in the design and positioning of the vertical members of the guard. The clearance between vertical elements shall not be greater than eight inches. Scope This standard pertains to mobile industrial or logging equipment where the operator may be exposed to hazards caused by falling objects such as tree trunks, snags, limbs, rocks, etc.
Purpose This standard is intended to describe the minimum requirements for the design and selection of plates and stiffeners for roof construction.
Refer to the aforementioned G Standard for details on substructure construction. Option Two - Analytical Methods The roof shall be designed to absorb J 8, ft-lb of impact energy without allowing a projectile measuring 20 cm 8 in in diameter to penetrate into the DLV as defined in SAE Ja.
Substructure of Roof All frame members and supports of the Cab Protective Structure shall be designed to resist the applied load in accordance with G This applies to all mobile equipment covered by G Such exit shall have a minimum clear opening of 60 cm 24 in diameter.
Option One - Plate Method The following are designed on the assumption that stiffeners will be used to limit the unstiffened areas not to exceed sq. Each grid opening shall not be greater than cm 2 64 square inches. A light gauge roof plate is recommended in conjunction with the grid. Scope This Standard pertains to mobile industrial equipment exposed to hazards from falling objects such as bricks, concrete blocks, and hand tools that may fall from relatively low heights encountered in operations such as highway maintenance or landscaping and other services on construction sites.
Purpose This standard is intended to describe the minimum requirement for the design and selection of plates for roof construction.
All frame members and supports of the Cab Protective Structure shall be designed to resist the applied load. The above is designed on the assumption that stiffeners will be used to limit the unstiffened areas not to exceed cm 2 in 2. This Standard only applies to portable wooden ladders built for use by workers at a job site.
This Standard does not apply to ladders which change ownership through sale or otherwise. Job Built Ladder up to 5 m 16 ft. Design A portable wooden ladder made at the job site must meet the following minimum requirements.
This standard provides specifications and performance criteria for leg protection for a worker using a chainsaw. Leg protection means personal protective equipment worn for protection from leg injury due to contact with a moving saw chain. Apron type - the protection material is secured to an apron style garment normally worn outside the trousers and secured around the worker's legs and waist. Chap type - the protection material is secured to a chap style garment normally worn outside the trousers and secured around the worker's legs.
The use of the leg protection must not unduly restrict the manoeuvrability of the worker. If the 28" length requirement results in a tripping hazard, the protective pad can be shorter, as long as it covers an area extending from the crotch to within 75 mm 3 in of the centre of the ankle. As amended August The protective material must be effectively secured in this position.
When a "heat seal" is used to control unravelling or fraying of synthetic fibres, the "heat seal" must be effective over the life of the product.
A heat seal subject to cracking must be covered to prevent abrasion of the wearer's skin. Tests must be done on leg protection samples assembled in the manner which the leg protection will be produced for distribution. The threshold chain speed is the chain speed at which rapid cut-through occurs and below which cut-through consistently requires 1. The year of manufacture must be included on a label or be otherwise marked on the garment.
The label must include garment level of performance. For example, a garment that is manufactured to the design specification of the WCB PPE 1 standard and meets the performance requirements for Class 2 garments in the ISO standard could incorporate a garment label as follows:. Test procedures and ratings for threshold chain speed may differ depending on the standard referenced; however performance in the field may be similar.
Comparisons of performance are best made by comparison of threshold chain speed numbers obtained using the same test method.
Under these circumstances, the higher the chain speed the greater the cut protection. This following standard outlines minimum requirements for three types of high visibility garments acceptable to the Workers' Compensation Board of British Columbia. The part of the garment visible either from the front or the back of the garment when the fully assembled garment is laid flat for inspection, not including the area of the VE trim.
The fraction of incident light reflected by a retroreflective surface per unit area. The unit of measurement is candelas per foot candle per square foot as measured at 0. A material that absorbs ultraviolet radiation in daylight and emits it in the visible light region. This property allows the material to radiate more visible light than is incident on it.
Therefore, it looks and is brighter than a non-fluorescent material which, at best, can reflect all the visible light that falls on it. A material that reflects light back to the same direction as the source of the light. Visibility enhancing trim attached to the garment. The trim has fluorescent and retroreflective properties. This standard does not apply to firefighters.
The background material in fluorescent or bright color in yellow, orange or red must meet the chromaticity coordinates and minimum luminance factor specified in Table 1. No part of the garment may melt, separate or ignite when subjected to degrees Fahrenheit air temperature for 5 minutes for high visibility garment used in environments where exposure to elevated temperatures or open flames is possible.
Where a worker is engaged in welding or burning operations, the high visibility garment must be made from flame retardant materials.
In an environment where loose fitting clothing may be caught by moving equipment or other stationary objects, high visibility garments must have "tear away" properties. An example of this is the use of Velcro TM strips for the fastening of the garment. Where high visibility garments are used in potentially explosive environments, Velcro TM strips must not be used due to static electricity concerns. All high visibility garments must be worn outside of all other clothing and must be fully fastened closed.
If the background material is of open weave construction the largest dimension in the openings of the background material must not exceed 3. VE trim must not be of open weave construction.
Have a smooth flat exterior finish. Be securely attached to the garment. Be applied so that it is visible on the side of the garment when worn. There must be a minimum of 77 square centimeters 12 square inches of VE trim within a defined area below the arm hole.
The defined area below the arm hole consists of a mm 6 inch wide vertical strip centered about the center line of the arm hole. In lieu of side VE trim, a band of 50 mm 2 inches wide VE trim may be placed around the sleeve at the wrist or upper arm area of the garment. Be applied to form one vertical stripe on either side on the front of the garment and an "X" pattern on the back of the garment.
Be at least 50 mm 2 inches wide. Be made either from; combined performance material that exhibits both fluorescent and retroreflective properties, or separate fluorescent and retroreflective materials.
The fluorescent portion of the trim must be fluorescent lime yellow if the background color is fluorescent orange, orange or red and must be fluorescent orange if the background color is fluorescent lime yellow, fluorescent yellow or bright yellow.
The minimum background area for either the front or the back of the garment is 0. The fluorescent portion of the VE trim for either the front or the back of the garment must have a minimum area of 0. The background of the garment must be either fluorescent lime yellow, fluorescent yellow, bright yellow, fluorescent orange, bright orange or bright red. The garment background must be fluorescent lime yellow, fluorescent yellow, or fluorescent orange colored. The garment must be designed so that there is color contrast along the entire length of at least one side of the VE trim.
It is anticipated that police forces and other emergency response personnel may require greater protection in the hours after dark due to the nature of their job function. In lieu of requirements 4, 5 and 6 above on the pattern, width and color of the VE trim specified, the VE trim used by these personnel for all garment types must:. A custom designed work platform must be certified by a professional engineer as having been built in conformance with the engineer's design. The work platform width must not be greater than the overall width of the lift truck measured to the outside of the load bearing tires, or to the outside of the stabilizers if they are to be used, plus mm 10 inches on either side of the tires or stabilizers as applicable.
If due to the nature of the work task to be done, guardrails or equivalent protection is not practicable for one or more sides of the work platform, there must be designated anchor points on the work platform for the securing of personal fall protection systems. There must be sufficient anchor capacity or individual anchors to allow for the maximum permitted number of work platform occupants to secure their personal fall protection systems.
The tilt function for the mast may be used to assist with final positioning the work platform at the task location but the mast must travel in a vertical plane. The trial lift must ensure adequate clearance can be maintained between the work platform and the elevating mechanism of the lift truck and any surrounding object such as a structure, overhead obstruction, storage rack, or scaffold, and from any hazard such as energized electrical wires and equipment.
If there is more than one occupant on the work platform, one person on the work platform must be designated to be the primary person to signal the lift truck operator regarding work platform movement requests. If hand and arm signals are not the main communication method, a system of hand and arm signals must be developed as an alternative in the event the primary voice or other electronic communication means becomes ineffective during work platform use.
This standard defines safety requirements for forklift mounted platforms which may be used to elevate personnel. The standard covers the following: Where forklift mounted work platforms are inappropriate for the job being performed, suitable elevating work platforms scissor lifts, boom lifts, etc.
Free descent means the uncontrolled and unintended descent of the platform. Rated load means the designed carrying capacity of the work platform. Work platform means a work platform that can be mounted on the forks of a lift truck to be elevated to overhead work locations.
Carrier Lift Truck Requirements Forklifts used for elevating personnel shall be designed, fabricated, operated, inspected, tested and maintained in accordance with the following standards:. Modifications and adaptations to the forklift which will affect its operation, hydraulic system or structural integrity shall be approved by the forklift manufacturer or a registered Professional Engineer.
Forklifts used for elevating personnel shall have a level indicating device attached to the mast to indicate when the mast is vertical. Restraints must be provided to ensure the mast is maintained within five degrees of the vertical position when personnel are elevated. Where the elevation of the platform is accomplished by a hydraulic cylinder assembly, the system shall be equipped to prevent free descent of the platform in the event of hydraulic line failure.
Responsibilities of Users 4. Ensure that the forklift is on level, stable ground and the area is clear of overhead hazards such as powerlines. Ensure that the load is centred laterally and is positioned as close to the mast as possible.
Ensure that the mast is vertical. General Platform Requirements All work platforms shall meet the following requirements. SAE Grade 5, the equivalent or better shall also be acceptable. Wooden platform components shall be constructed from 2 grade or better; species to be limited to the following groups: All lumber shall be graded according to the National Lumber Grades Authority Rules or other approved grading rules. All lumber shall be grade stamped by an approved agency.
Self-latching mechanisms are acceptable. The dangerous parts of all moving machinery including the shearing hazards created by the movement of the lifting mechanism shall be securely guarded against inadvertent contact by occupants of the platform. Guardrails must be capable of withstanding a horizontal force of lbs. Chains are not to be used for guardrails. Guardrails may be removable or hinged for opening during loading and unloading. They shall be constructed to accomplish proper positioning and so that a secured condition is discernible.
Where removable guardrails are installed the toe boards must also be removable. Name and address of manufacturer Name of engineer if engineering certification is required Platform weight Platform rated load carrying capacity Minimum carrier forklift requirements: The requirements of Section 6. The platform must be positioned with the shorter axis parallel to the forks. Forklift weight Ibs. Please note, during Inspection, defective goods are categorized as Critical, Major or Minor according to their importance to the customers.
One critical defect can make us failure in result of Inspection, so, we all need be more sincere about defects. Critical Defect is one that relates to a safety or legal problem, or a delivery error which prevents distribution of the product to the customer. See following image of Final Inspection Sheet. See image below for your reference. More articles of this writer: Major Formula on Garments for Beginners. Basic Tests of Textile Fabric. Students, teachers and professionals can publish your article here.
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