1、Printed in U.S.A.A SS EAMERICAN SOCIETY OFSAFETY ENGINEERSAMERICAN NATIONAL STANDARDANSI/ASSE A10.20 2006 (R2011)ANSI/ASSE A10.20 2006 (R2011)Safe Operating Practices forTile, Terrazzo, and Marble WorkANSI/ASSE A10.20 2006 (R2011)American National Standardfor Construction and Demolition OperationsTh
2、e information and materials contained in this publication have been developed from sources believed to be reliable. However, the American Society of Safety Engineers (ASSE) as secretariat of the ANSI accredited A10 Committee or individual committee members accept no legal responsibility for the corr
3、ectness or completeness of this material or its application to specific factual situations. By publication of this standard, ASSE or the A10 Committee does not ensure that adherence to these recommendations will protect the safety or health of any persons, or preserve property. ANSI ANSI/ASSE A10.20
4、 2006 (R2011) American National Standard Construction and Demolition Operations Safe Operating Practices for Tile, Terrazzo, and Marble Work Secretariat American Society of Safety Engineers 1800 East Oakton Street Des Plaines, Illinois 60018-2187 Approved May 19, 2011 American National Standards Ins
5、titute, Inc. Approval of an American National Standard requires verification by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, direc
6、tly and materially affected interests have reached substantial agreement. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. The use
7、of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he/she has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American Nati
8、onal Standards Institute does not develop standards and will in no circumstance give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards I
9、nstitute. Requests for interpretation shall be addressed to the secretariat or sponsor whose name appears on the title page of this standard. Caution Notice: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require t
10、hat action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Published July, 2011 by American Society of Safety Engineers 18
11、00 East Oakton Street Des Plaines, Illinois 60018-2187 (847) 699-2929 www.asse.org Copyright 2011 by American Society of Safety Engineers All Rights Reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permissi
12、on of the publisher. Printed in the United States of America American National Standard Foreword (This Foreword is not a part of American National Standard A10.20-2006 (R2011).) This standard is one of a series of safety standards that have been formulated by the Accredited Standards Committee on Sa
13、fety in Construction and Demolition Operations, A10. It is expected that the standards in the A10 series will find a major application in industry, serving as a guide to contractors, labor, and equipment manufacturers. For the convenience of users, a list of existing and proposed standards in the A1
14、0 series for Safety Requirements in Construction and Demolition Operations follows. A10.1 Pre-Project/Pre-Task Safety it is not intended to supersede applicable federal, states or municipal laws, rules and regulations. 1.5 References. For other construc-tion and demolition standards, please refer to
15、 the other A10 Construction and Demolition standards. 1.6 Housekeeping. In the course of installations during construction, alteration or repairs, form and scrap lumber and all other debris shall be kept cleared from work areas, passageways and stairs in and around buildings or other structures. Mat
16、erial storage areas and walkways on the construction site shall be maintained free of dangerous depressions, obstructions and debris. Housekeeping depends on the brooms and tools needed for its performance, and these shall be available. 1.7 Removal of Debris. Piles of combustible/flammable scrap and
17、 accumu-lated debris shall be removed promptly during the course of construction. Adequate means shall be provided to expedite such removal. 1.8 Installation Areas Illumination. Working areas, stairways, aisles, passage-ways, workbenches and machines shall be provided with either natural or artifici
18、al illumination that is suitable to secure the safety of employees. The minimum illumin-ation shall be 20-foot candles. 2. REFERENCES For other construction and demolition standards, please refer to the other ANSI/ASSE A10 Construction and Demolition standards. 3. DEFINITIONS In this standard the fo
19、llowing definitions shall apply: 3.1 Competent Person. One who is capable of identifying existing and predictable hazards in the surroundings or working conditions, which are unsanitary, hazardous or dangerous to employees, and has authorization and responsibility to take prompt corrective measures
20、to eliminate them. 3.2 Equivalent. An alternate design, feature, device or protective action that provides an equal or greater degree of safety. AMERICAN NATIONAL STANDARD A10.20-2006 (R2011) 12 3.3 Factor of Safety (Safety Factor). The ratio of structural ultimate or yield stress to the allowable s
21、tress. Factor of safety is equal to structural ultimate or yield stress divided by the allowable stress. When the safety factor is based on yield stress, as for structural steel, it is lower than those safety factors based on the ultimate breaking strength of the materials. The safety factor for lum
22、ber is computed on the basis of the average value of the modulus of rupture. 3.4 Guard/Guarded. A guard will isolate people from unsafe conditions by being designed and constructed to provide positive protection; prevent all access to the danger zone during operations; cause the operator no discomfo
23、rt or inconvenience; operate automatically; be suitable for the job or machine; constitute a built-in feature; provide for maintenance, inspection, adjust-ment and repairs; withstand the life cycle of the job or machine; be durable; not constitute a hazard by themselves and protect against unforesee
24、n operational contingencies. 3.5 Guard Rail/Railing System/Stair Railing System. Framework of vertical, horizontal or inclined members, grillwork or panels, or combinations thereof, supporting a handrail and acting as a safety barrier for protection of persons at or near the outer edge of stair, ram
25、p, landing, platform, hatchway, manhole or floor opening. Reference ANSI/ASSE A1264.1, Safety Requirements for Workplace Floor and Wall Openings, Stairs and Railing Systems. 3.6 NIOSH. National Institute for Occupational Safety and Health. 3.7 Qualified Persons. Those people who, by profession or a
26、recognized degree, certificate and professional standing, or by extensive knowledge, training and exper-ience, have demonstrated their ability to solve or resolve problems related to the subject matter of this standard. 3.8 Shall. To be understood as a requirement (mandatory). 3.9 Should. To be unde
27、rstood as a recommendation. 3.10 Standard. An established meas-ure, type, model or example that has been accepted and recognized in the construction industry, such as construction safety standards approved by the American National Standards Institute. 3.11 Storage. Defined as more than one days mate
28、rials. 3.12 Supply. Defined as one days materials. 4. MATERIAL HANDLING 4.1 General. This section outlines safety requirements applicable to handling and storage of dry bagged cement, lime, marble chips, mortar, grout, bonding agents and fine sand. 4.2 Unloading Facilities for Bagged Material. 4.2.1
29、 Conveyors and Related Equip-ment. The design and construction of conveying equipment shall be in accordance with ANSI/ASME B20.1, Safety Standard for Conveyors and Related Equipment, and the manufacturers specifi-cations and programmed instructional materials. 4.2.2 Exposed Moving Parts. Exposed mo
30、ving parts shall be guarded in conformity with ANSI/ASME B15.1, Safety Standard for Mechanical Power Transmission Apparatus, and the manufacturers instructions, spec-ifications and programmed instructional materials. 4.2.3 Guardrails and Toe Boards. Guardrails and toe boards shall be installed in ac
31、cordance with ANSI/ASSE A10.18, Safety Requirements for Temporary Floors, AMERICAN NATIONAL STANDARD A10.20-2006 (R2011) 13 Holes, Wall Openings, Stairways and Other Unprotected Edges in Construction and Demolition Operations. 4.3 Storage Facilities. 4.3.1 Bagged Material. Storage facili-ties for ba
32、gged material shall be carefully selected. The maximum storage capacity of the surface/floor shall be determined and clearly indicated only after thorough investi-gation of the strength of the structure and its foundation except that this shall not be required for slabs on grade. Bags outer surface
33、shall have a co-efficient of friction of 0.5 or greater. 4.3.2 Access for Forklift. When forklift trucks are to be used, access facilities for forklift trucks, including ramps and aisles, shall be 3 feet plus the width of the fork truck. Aisles shall be kept clear. Back up alarms with disconnecting
34、seat break switch, seat belts, offset controls or guarded controls from inadvertent operation and dual rear view mirrors shall be installed on the fork truck. 4.3.3 Stacking of Bagged Materials. Bagged materials shall be stacked in an orderly manner to maintain stable piles by stepping back the laye
35、rs and cross keying the bags at least every ten bags high. Sacks shall be removed uniformly from the top of the piles to avoid tipping the stack. Employees shall not climb on the stacks. 4.4 Transfer Equipment. Mechanical material handling equipment to move bagged materials shall be recommended for
36、bags over 50 pounds. 4.5 Housekeeping. Broken pallet, crates, packing materials and empty bags shall be disposed of promptly to eliminate fire and tripping hazards. Returnable pallets shall be stored flat in an orderly manner. Flammable material shall be stored outside of the structure, and flammabl
37、e materials shall be limited to a one day supply at the work area. 4.6 Personal Hygiene. Use of suit-able protective clothing and protective creams or lotions and the availability and use of hand washing facilities shall be provided to prevent dermatitis and skin irritation. 4.7 Fire Extinguisher. F
38、ire extin-guishers and fire suppression equipment shall be provided for as determined by a competent person. 5. MORTAR PLACEMENT 5.1 General. This section contains safety requirements applicable to the mixing, conveying, placement, curing and finishing of mortar. It deals with placement by conventio
39、nal methods as well as by pumping and other specialty methods. Safety provisions relating to surface preparation are also included. In some instances, others may furnish the equipment described in this section. 5.2 Mixing, Finishing and Handling Equipment. 5.2.1 Concrete Mixers. Concrete mix-ers wit
40、h one-cubic yard or larger loading skips shall be equipped with a device to clear the skip of material. 5.2.2 Guardrails. Mixers of one-cubic yard or greater capacity shall be equipped with protective guards/guardrails of pipe or similar material installed on each side of the skip. 5.2.3 Aggregate S
41、torage and Han-dling. Aggregate hoppers, bins, conveyors, ramps, etc. shall be designed to safely withstand the intended loads with a factor of safety of 3. 5.2.4 Conveyors. Conveyors shall be designed, installed, operated and main-tained in accordance with ANSI/ASME B20.1, Safety Standard for Conve
42、yors and Related Equipment. Conveyor systems shall AMERICAN NATIONAL STANDARD A10.20-2006 (R2011) 14 be equipped with an audible pre start-up signal device. Where conveyors are operated in tunnels, pits and similar enclosures, ample room shall be provided to allow safe access and operating space. An
43、 emergency stop device shall be installed along the length of the conveyors. 5.2.5 Powered Finishing Machines. Powered and rotating-type machines (including terrazzo surfacing machines, power routers) that are manually guided shall be equipped with a control switch that will automatically shut off t
44、he power whenever the operators hands are removed from the equipment handles. 5.2.6 Mortar Buggies. Handles of buggies shall not extend beyond the wheels on either side of the buggy. Installation of knuckle guards on buggy handles shall be installed on motor buggies. 5.2.7 Pumping Systems/Compressed
45、 Air Hoses. Pumping systems using discharge pipes shall be provided with pipe supports designed for 100 percent overload. Where employees are required to work from the pipe supports, the supports and scaffolding shall have a minimum safety factor of 4, with guardrails and toe boards or fall arrest s
46、ystems. Compressed air hoses in such systems shall be provided with positive fail-safe joint with whip checks connectors to prevent separation of sections when pressurized. See definition for factor of safety in Section 3. Scaffolds and their components shall be capable of supporting without failure
47、 at least four times the maximum intended load. 5.2.8 Walkways and Scaffolding. Walkways and scaffolding equipped with guardrails and toe boards shall be provided along the access and at any point of placement located more than 6 feet above the floor, ground or water level. Such scaffolding and guar
48、drails shall be designed and constructed in accordance with 6.5.1 with any deficiency repaired before use. Rated capacities of the scaffold shall be posted. Walkways and scaffolding supplied by others shall be inspected for compliance prior to use. Inadequacies shall be cor-rected before use and rec
49、orded in writing. 5.2.9 Guarding Moving Parts. Belts, gears, shafts, pulleys, sprockets, spindles, drums, flywheels, chains and other recip-rocating, rotating or moving parts of equipment shall be guarded if such parts are exposed to contact by persons or otherwise constitute a hazard. Guarding shall conform to ANSI/ASME B15.1, Safety Standard for Mechanical Power Transmis-sion Apparatus. See definition of guarded. 5.2.10 Lockouts. Stationary power-driven equipment or stored energy equipment such as compressors, mixers, conveyors and screens or any equipment with the poten
