Natural phenomena - 188 entradas encontradas
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Wianecki J., Adenot A.
Improved wind stability of prefabricated formwork
Pour une meilleure stabilisation des banches au vent. [en francés]
This technical study is in 4 parts: effects of wind on formwork (drag, boundry layer, turbulence zone); limits of application to shuttering of the coefficient of drag of the French "snow and wind" rules; wind tunnel tests (likelihood of over- or underestimating the drag coefficient); calculation of wind effects (formulae).
Cahiers des Comités de prévention du bâtiment et des travaux publics, Mar.-Apr. 1979, No.2, p.60-80. Illus.
Leiteritz H., Seewald H.
Possibilities and limitations of water infusion into the coal seam to prevent rock bursts
Möglichkeiten und Grenzen des Tränkens zur Verhütung von Gebirgsschlägen [en alemán]
The efficacity of water infusion to prevent dangerous stresses of the ground, already demonstrated for dust control, was tested. The article deals with techniques of infusion, characteristics of the seam and ground pressure, and describes a method of monitoring the degree of impregnation of the coal seam: a probe consisting of a gamma ray source and a detector is introduced into a borehole, and the degree of impregnation is determined from the difference in diffuse radiation measured before and after the infusion.
Glückauf, Aug. 1978, Vol.114, No.16, p.700-705. Illus. 7 ref.
Lazarov G., Marton T.
Atmospheric pressure changes as a factor in occupational accidents
Promenite v atmosfernoto naljagane kato riskov faktor za trudovi zlopoluki [en búlgaro]
Results of a statistical analysis of accidents notified in 2 Bulgarian undertakings in 1975-1976 in the light of the prevailing meteorological conditions. The ratio between accidents during periods with constant atmospheric pressure, rising pressure, and falling pressure was 1:1.27:1.87. There was no relation between the intensity of pressure changes and accident frequency in the case of accidents occurring during periods of rising pressure. This relation was linear between atmospheric pressure and the accident rate in winter when the pressure was falling.
Higiena i zdraveopazvane, 1978, Vol.21, No.3, p.245-253. Illus. 7 ref.
Vasjučkov Ju.F., Rudakov B.E., Selivanova G.I.
Treatment of coal face with surfactant and hydrochloric acid solutions for removal of methane
Obrabotka ugol'nogo plasta rastvorami PAV i soljanoj kisloty s cel'ju degazacii [en ruso]
Description of tests in Soviet coal mines to develop a more rapid and efficient method of removing methane. Best results were obtained by hydraulic breaking of the face using an aqueous solution of 6% HCl and 0.025% surfactant. Theoretical considerations on the mechanism of action of the solutions tested (quantitative data on the increased injectibility coefficient of the face as a result of the surfactant and influence of hydrochloric acid on desorption of methane in the coal), with the main results.
Ugol', Apr. 1978, No.4, p.55-58. Illus. 7 ref.
Taševa M., Kazakova B.
Influence of high ambient temperature on Polikron poisoning
Vlijanie na visokata okolna temperatura vărhu intoksikacijata s polikron [en búlgaro]
Polikron, an organic thiophosphate insecticide, was administered to white rats in a dose 1/50 of the DL50 for 90 days, in an ambient temperature of 35°C. Study of the hepatotoxic effects as shown by enzyme activities and histochemical liver changes showed that the combination of the 2 factors produced more severe effects than in control animals given only the insecticide.
Higiena i zdraveopazvane, 1978, Vol.21, No.2, p.147-151. Illus. 4 ref.
Wind - Useful fundamentals for prevention
Le vent - Rappel de notions de base utiles ŕ la prévention. [en francés]
Contents of this note intended for worksite managers and project managers: general remarks on wind (origin, direction, speed); use of weather forecasts; calculation of the effect of wind on buildings under construction and tower cranes; causes and prevention of hazards (blowing over of formwork and structures, possibly followed by a chain reaction; blowing over of lifting equipment; swaying or spinning of large loads; falling of objects and equipment; loss of balance of workers; splashing by a flammable liquid; collision). The relevant French regulations are quoted.
Cahiers de notes documentaires - Sécurité et hygične du travail, 2nd quarter 1978, No.91, Note No.1113-91-78, p.215-242. Illus. 11 ref.
Safe lifting with the "Antispin" device
Veilig hijsen met de "Antispin" [en holandés]
Description of a device developed by the author to prevent spinning of loads lifted by crane, due to wind load. The author gives the reasons why bulky loads have a tendency to spin, and develops the idea of applying a reacting torque to the spinning torque caused by the wind. This idea can be put into practice by equipping a crane (overhead travelling crane or jib crane) with 2-rope pulley block for the hood; the block is provided with a hydraulic servo-system that brakes any unwanted spinning movements. The triggering of the servo-system may be controlled by a mechanical device sensing the rope speed. The device is an autonomous unit adaptable to any existing crane.
De veiligheid, Feb. 1978, Vol.54, No.2, p.53-55. Illus.
Harlfinger O., Jendritzky G.
Industrial accidents and the weather
Accidents du travail et conditions météorologiques. [en francés]
Translation of: Betriebsunfälle und Wetter. Münchener medizinische Wochenschrift, München, Germany (Fed.Rep.), 1976, Vol.118, No.3, p.69-72. Illus. 11 ref. (CIS 77-277). The influence of the weather, especially warm wind and humid conditions, on the accident situation has been the subject of several studies with contradictory results. This comparative study of 36,547 accidents in the automobile industry and the prevailing weather conditions in south-west Germany for 1971-1974 shows a striking increase in accidents during south-west weather conditions with influx of warm air and unstable processes (heat thunderstorms). This is in line with the observation of a large incidence of accidents, especially traffic accidents, in relation to warm-air advection phases (foehn conditions) in the foreland of the Alps. There was no difference in accident frequency between German and the mostly meridional foreign workers.
Traduction INRS 61 B-77, Institut national de recherche et de sécurite, 30 rue Olivier-Noyer, 75680 Paris Cedex 14, France, 1977. 13p. Illus. 11 ref.
Perkul' M.M., Korotkova E.S., Morozova Ė.F.
Influence of geological and technical factors on morbidity rates in coal miners
Vlijanie tehničesko-ėkonomičeskih faktorov na uroven' zabolevaemosti šahterov [en ruso]
To determine the influence of certain geological, engineering and economic factors (thickness of seam, ash content of coal, degree of mechanisation, mobility of supervisory staff, etc.) on morbidity and on the frequency of non-fatal accidents, the authors developed a mathematical model based on a multiple regression equation. Reproduction of a table showing the degree of influence which each factor considered has on the morbidity rate. The major factors were: thickness of seam (the thicker the seam, the higher the dust concentration level) and ash content (coal ash contains 50-60% free silica).
Gornyj žurnal - Izvestija vysših učebnyh zavedenij, Nov. 1977, No.11, p.69-71. 3 ref.
Erofeev N.I., Podobed V.A.
Crane operation under strong wind conditions
Rabota pod"emnyh kranov pri sil'nom vetre [en ruso]
Description of a method of drawing up a wind map developed in a Black Sea port; reproduction of an equation whose terms express wind direction and force at different locations. With this equation, the wind conditions calling for interruption of work for reasons of safety can be predicted.
Bezopasnost' truda v promyšlennosti, Mar. 1977, No.3, p.37-38. Illus. 4 ref.
Occupational health in the tropics.
Communication to the Symposium on geography and occupational health (Brighton, United Kingdom, 14-19 Sep. 1975). The differences between occupational health in tropical and non-tropical countries are studied and discussed. Attention is drawn to heat stress, specific biological hazards, genetic constitution, differences in education and sophistication, and the preponderance of small-scale traditional industries. Requirements for occupational health teaching in the tropics are set out, and the first 2 years' experience of a newly established course in occupational health set up in Singapore is described.
Journal of Occupational Medicine, July 1977, Vol.19, No.7, p.458-463. Illus. 17 ref.
Triggering behaviour of fault-current circuit-breakers in the presence of atmospheric overvoltage
Das Auslöseverhalten von Fehlerstromschutzschaltern beim Auftreten atmosphärischer Überspannungen [en alemán]
After a short report of practical experience the incidence and degree of atmospheric overvoltage and the resistance of low-voltage installations to voltage surges are described. In order to use fault-current circuit-breakers even when it is imperative to avoid switching-off areas of the installations, it is suggested that circuit-breakers with a slightly delayed response be used. Description of systems operated by a capacitor discharge.
Österreichische Zeitschrift für Elektrizitätswirtschaft, Feb. 1977, Vol.30, No.2, p.47-51. Illus. 7 ref.
DIN 61 536, German Standards Institute (Deutsches Institut für Normung), Berlin (West), June 1976.
2-piece winter protective workclothes for men
Zweiteilige Winterschutzanzüge für Herren [en alemán]
This standard, which lays down safety specifications under the Act of 24 June 1968 (Germany, Fed.Rep.) respecting technical equipment in industry, applies more particularly to protective clothing worn in the building construction and civil engineering sector. Sections are devoted to: fabrics and features of outer garment and lining, accessories, sizes, tailoring, cutting, wear testing, marking. List of other pertinent standards.
Beuth Verlag GmbH, Burggrafenstrasse 4-7, D-1000 Berlin 30. 7p. Illus. Price: DM.17.60.
Stear H.S., Conway J.P., Bates R.C.
Roof-fall resupport accidents - A study.
47 accidents occurring in 1966-1974, resulting in 62 injuries or fatalities, are analysed statistically from 42 viewpoints under the following heads: general; time; geology; job; supervision; roof testing; hazard warning; supports; fall statistics; unsafe acts and conditions. Types of resupport work are described, and a suggested resupport procedure outlined. Appendix: 47 descriptive accident reports.
Information Circular 8723, Bureau of Mines, 4800 Forbes Avenue, Pittsburgh, Pennsylvania 15213, USA, 1976. 94p. Illus.
Stability of unretained slopes and embankments
Stabilité des pentes et talus non soutenus. [en francés]
This booklet is intended for engineers and technical personnel of building construction and civil engineering firms. Contents: introduction (statistical data, hazards, regulations); various types of landslides and earthfalls; characteristics of soil shearing (physical actions, measurements); hypotheses and parameters used in calculating slope stability; methods of slope stability calculation - critical height; influence of water on slope stability; risk analysis in project design and execution - safety aspects. A roundup of theory and commented diagrams of measuring apparatus are appended.
Edition INRS No.514, Institut national de recherche et de sécurité, 30 rue Olivier-Noyer, 75680 Paris Cedex 14, France, July 1976, 98p. Illus. 15 ref.
Harlfinger O., Jendritzky G.
Industrial accidents and the weather
Betriebsunfälle und Wetter [en alemán]
The influence of the weather, especially of the warm wind and humid conditions, on the accident situation has been the subject of several studies with contradictory results. A new comparative study of 36,547 accidents in the automobile industry and the prevailing weather conditions in south-west Germany for the years 1971-1974 shows a striking increase in accidents during south-west weather conditions with influx of warm air and unstable processes (heat thunderstorms). This is in line with the observation of a large incidence of accidents, including traffic accidents, in relation to warm-air advection phases (foehn conditions) in the foreland of the Alps. There was no differences in accident frequency between German and the mostly meridional foreign workers.
Münchener medizinische Wochenschrift, 1976, Vol.118, No.3, p.69-72. Illus. 11 ref.
Man, climate and architecture.
This book, based on a graduate course given by the author, places emphasis on the interactions between the various factors involved. It is divided into 5 main parts, each containing several chapters: description of the climatic elements, their physiological, sensory and biophysical influences; thermophysical properties of building materials and their effect on the indoor climate; impact of solar radiation on buildings and implications for design; ventilation problems; integration of the material of the foregoing chapters into design principles and details, for different types of climate. A subject index is appended.
Architectural Science Series, Applied Science Publishers Ltd., Ripple Road, Barking, Essex, United Kingdom, 2nd edition, 1976. 483p. Illus. 269 ref.
Mutchler J.E., Malzahn D.D., Vecchio J.L., Soule R.D.
An improved method for monitoring heat stress levels in the workplace.
Studies in 15 types of plant are described, which indicated the existence of characteristic empirical relationships between wet bulb globe temperature (WBGT) and outdoor meterorological conditions. Linear regression models were developed taking the following weighted variables into account: dry-bulb temperature, ventilated wet-bulb temperature, globe temperature, wind speed, total sky cover, and relative humidity. Three sets of relatively simple equations can be used to calculate WBGT in hot work environments; these are designed, respectively, to estimate future WBGT levels from weather forecasts, current levels from current values obtained from a nearby weather station, and current levels from measurements made in the immediate vicinity of the worksite concerned. Application of the models is described in detail.
American Industrial Hygiene Association Journal, Mar. 1976, Vol.37, No.3, p.151-164. Illus. 9 ref.
Pandya K.P., Rao G.S., Ohasmana A., Zaidi S.H.
Occupational exposure of petrol pump workers.
Environmental and biochemical tests were carried out in 21 filling stations and among 51 filling station attendants in the Lucknow area in India to determine the risks attached to the handling of petrol in hot weather in a tropical country. The findings are compared with those of similar surveys conducted in temperate countries. It is concluded that exposure to benzene (the petrol contained 10-17% benzene) is hazardous in hot weather and that the workers concerned should be informed of the toxic nature of petrol vapours and the need to avoid inhalation.
Annals of Occupational Hygiene, Dec. 1975, Vol.18, No.4, p.363-364. 9 ref.
Hazard of landslides in mountain work sites
Il pericolo delle frane nei cantieri di montagna [en italiano]
This article reviews the various factors causing landslides, classifies the various types of landslide, and recommends several measures to prevent their happening: geological survey of the site; removal of infiltrated water by drainage; consolidation and regulation of mountain torrent beds; ground consolidation of slopes; afforestation; other types of action and precautions.
Sicurezza nel lavoro, Mar.-Apr. 1975, Vol.27, No.2, p.2-5. Illus.
Rain-proof insulating rods for work with rated voltages up to 110kV
Regensichere Betätigungsstangen mit Nennspannungen bis 110kV [en alemán]
Presentation of insulating rods offering protection during work in the rain with voltages of 30, 60 and 110kV: properties required, testing, design, materials employed, electrical and mechanical characteristics. The rods consist of a tube of fibrous-glass-reinforced epoxy resin filled with polyurethane foam. The outer casing of the rods and the umbrella discs are composed of silicon rubber. The number of discs varies according to the voltage: 2 for 30kV, 3 for 60kV, and 4 for 110kV.
Sichere Arbeit, 1975, Vol.28, No.2, p.11-14, 22. Illus.
Iwanoff I., Jungmann H., Probst P.
Air-conditioning systems and disease due to cold
Klimaanlagen und Erkältungskrankheiten [en alemán]
Inspection of the log books of 39 merchant vessels, some equipped with air conditioning but the others not, which had made 820 voyages to tropical zones. The incidence of respiratory disease was twice as high in the air-conditioned ships. The deduction may be drawn from these data that air-conditioning should be adapted not only to general comfort conditions but also to outside temperatures.
Arbeitsmedizin - Sozialmedizin - Präventivmedizin, Apr. 1975, Vol.10, No.4, p.78-81. 6 ref.
Ogden T.L., Wood J.D.
Effects of wind on the dust and benzene-soluble matter captured by a small sampler.
When dust is collected by means of filter holders quite low winds can cause serious errors. Collection efficiencies are presented for a filter-holder dust sampler at present in wide use at British coke oven plants. When the holder faces the wind, efficiency increases with particle size up to 15µm. Efficiency falls with increasing particle size when the holder is side-on to the wind. In the industrial situation studied the benzene-soluble matter measurements were subject to less error than the total dust, but such errors must be borne in mind when measurements with small filter holders are interpreted. Some determination of the wind effect in a particular sampling situation is desirable.
Annals of Occupational Hygiene, Feb. 1975, Vol.17, No.3-4, p.187-195. Illus. 8 ref.
Evaluation of efficiency of heat resistant glass fitted to window panes.
This article, of particular interest to industrialists in tropical countries, first comments on various means of combating climatic heat (solar reflecting materials on factory roofs, sun breakers constructed beside buildings, orientation of buildings, use of heat reflective glass in windows). Follows a report of a study carried out with heat reflective glass windows as regards thermal load (materials and methods used). Results (given in tabular form) show that, because of various factors, temperatures inside the room with heat reflective glass windowpanes was significantly higher than those inside the room with ordinary glass panes and that therefore this method is unsuitable for reducing thermal load.
Indian Journal of Industrial Medicine, Oct. 1974, Vol.20, No.4, p.175-181.
DIN 61536, German Standards Committee (Deutscher Normenausschuss), Berlin (Westsektoren), Feb. 1974.
Two-piece protective winter overalls for men
Zweiteilige Winterschutzanzüge für Herren [en alemán]
This standard specifies sizes and dimensions, fabrics used, design, cutting and tailoring, testing and marking of these winter overalls specially designed for use in the construction industry.
Beuth-Vertrieb GmbH, Burggrafenstrasse 4-7, 1 Berlin 30. Illus. Price: DM.6.60.
Janíček M., Folprechtová A., Podivínský R., Krč I.
Body response to heat stress in blacksmiths
Odpověd' kovářů na pracovně tepelnou zátěž [en checo]
Observations were carried out in 20 blacksmiths in summer and winter. In summer the ambient temperature and the resultant time-weighted mean temperature, the mucosal temperature, sweat rate, serum sodium level, the Na/K ratio in saliva and the number of basophile leukocytes in the peripheral blood all showed significantly higher values at the end of the work shift than at the commencement. Diuresis and caloric uptake decreased significantly. In summer and winter the skin temperature correlated significantly with the resultant time-weighted mean temperature, and there was a significant correlation between heart rate and the workers' age. A significant correlation was observed only in summer between the resultant time-weighted temperature, skin temperature and the variations in the number of basophile leukocytes. A link could be established between the ambient temperature and the variations in skin temperature, serum sodium level and Na/K ratio in saliva.
Československá hygiena, Mar. 1974, Vol.19, No.2, p.90-97. Illus. 32 ref.
Federal Ministry of Labour and Social Affairs (Bundesministerium für Arbeit und Sozialordnung), Bonn, 30 Sep. 1974.
Ordinance on special occupational safety and health requirements for work in the open from 1 November to 31 March
Verordnung über besondere Arbeitsschutzanforderungen bei Arbeiten im Freien in der Zeit vom 1. November bis 31. März [en alemán]
These regulations apply to work in the open and to construction work (building and civil engineering). Its provisions concern protection of workplaces against winter weather conditions, appropriate clothing, maintenance and lighting of communication ways, and precautions for enclosed workplaces. A commentary on the regulations is published on p.309-312 of the same periodical.
Arbeitsschutz, Nov. 1974, No.11, p.324-325.
Assessment of duration of peaks above maximum admissible methane concentrations
Raspredelenie dlitel'nosti prevyšenij dopustimogo urovnja koncentracii metana [en ruso]
Description of a mathematical method for assessing both the average concentration and the duration of peaks above the maximum admissible concentration of methane contained in the air emerging from mine workings. The method is based on the probability of methane outbursts and has been experimentally tested. The assessment of the above parameters is vital for the design of automatic safety systems for gassy coal mines.
Gornyj žurnal - Izvestija vysših učebnyh zavedenij, May 1974, No.5, p.80-85. Illus. 5 ref.
Some considerations on the heating of workshops in winter.
Studies of subjective thermal comfort sensations of personnel employed in some 150 offices and 180 factories were performed in 1947, 1964 and 1973. Numerous diagrams illustrate the relationships between the following factors: proposed and actual ambient temperatures and humidity in offices and factories in different industries; subjective thermal sensation and frequency of colds compared with actual thermal conditions in offices; work fitness and efficiency, amount of clothing, skin temperature and ambient temperature. In order to achieve thermal comfort it was necessary to have appreciably higher temperatures in 1973 than in 1964. The comfort temperature for sedentary workers in winter increased by 5-7°C between 1947 and 1973. (Summary and captions in English).
Journal of Science of Labour - Rōdō Kagaku, May 1974, Vol.50, No.5, p.299-318. Illus. 40 ref.
Avalanche hazards to accommodation and construction sites
Snřskredfare ved oppholds- og anleggssteder [en noruego]
When planning construction sites potentially exposed to avalanches, an expert should be consulted about the precautions necessary. An expert should also be consulted if, after work has been started, the avalanche danger is found to be different from the initial evaluation, and in the event of accidents due to avalanches. The rules also deal with the organisation of a rescue team and the provision of adequate rescue and first aid equipment. If 2 or more employers are engaged on a construction site, they should collaborate in the observance of these safety requirements.
Verneregler nr.19, Directorate of Labour Inspection (Direktoratet for arbeidstilsynet), Postboks 8103, Oslo-Dep., Norway, May 1974. 4p. Gratis.
Cumming G.D., Bailey G.
Seasonal variation of cardiorespiratory fitness of grain farmers.
Maximal oxygen uptake and physical working capacity of 29 Canadian farmers fell about 10% from April before seeding to September after harvesting. The work of caring for livestock in winter, plus winter sport, may have led to a greater level of fitness in winter than that provided by the physical activity required for the summer grain operation. The advantage of the farmer regarding a reduced frequency of clinical coronary heart disease may be related to physical fitness; if so, the highly mechanised farmer may need to take steps to maintain his fitness if he wishes to keep this advantage.
Journal of Occupational Medicine, Feb. 1974, Vol.16, No.2, p.91-93. 10 ref.
Snow removal and ice control on highways.
This data sheet emphasises the need for advanced planning in the removal of snow and ice and deals with training of personnel, selection of equipment, inspection and maintenance, and snowploughing plans. Detailed information is provided for the application of salt and other chemicals.
Data Sheet 638, National Safety Council, 425 North Michigan Avenue, Chicago, Illinois 60611, USA, 1973. 14p. Illus. 5 ref. Price: US-$0.50.
A guide for scaffolding designers - Wind forces on unsheeted and sheeted scaffolding.
This guide is based on the British standard code of practice on wind loads and is designed to offer a simple method of assessing the wind forces exerted on a scaffolding. It tabulates the wind pressure per metre of tube broadside on to the wind for sites in different localities and for structures of different heights. It also provides data for sites with shelter and low risk, and for sites with high exposure and high risk. Similar data for sheeted structures are also given.
National Association of Scaffolding Contractors, Glen House, Stag Place, London S.W.1, United Kingdom, June 1973. 5p. Illus. Price: Ł0.15.
Ajzenštat B.A., Osoveckaja C.M., Anan'ina V.M., Karpačeva O.F.
The thermal balance of tractor drivers in cotton farming during the hot season
Teplovoe sostojanie mehanizatorov hlopkovodstva v žarkij period goda [en ruso]
Study of climatic conditions in tractor cabs and measurement of parameters characterising drivers' thermal load (skin temperature, stroke volume, cardiac output, speed of processing information, etc.). The thermal balance of persons not protected against solar radiation and of persons protected by a cab were calculated from the results. The period during which the least favourable thermal conditions occur is between 13 and 17h in June and July; this should be taken into account in planning the working day. It is also suggested that showers should be installed on agricultural machinery, screens should be set up along field borders to shelter workers during breaks, and light work clothing should be supplied.
Gigiena truda i professional'nye zabolevanija, Oct. 1973, No.10, p.8-11. 3 ref.
The natural immunity of workers exposed to different industrial microclimates
Sostojanie estestvennogo immuniteta u rabotajuščih v različnyh uslovijah proizvodstvennogo mikroklimata [en ruso]
Results of a study of the immunobiological reactivity of workers exposed to different microclimates (building workers, hot plant workers, assembly shop workers) in winter and in summer. The author could demonstrate that immunobiological reactivity was highest among building workers exposed to a dynamic microclimate and to solar radiation, whereas it was lowest among hot plant workers, particularly in summer. Assembly workers employed in heated workshops with a normal microclimate had a lower immunobiological reactivity than building workers during the 2 seasons covered by the survey.
Gigiena truda i professional'nye zabolevanija, July 1973, No.7, p.41-43. 7 ref.
Belobrov E.P., Pavlova E.S., Šafran L.M.
Effect of climatic, geographic and occupational factors on the body's immunobiological reactivity
Vlijanie kompleksa klimato-geografičeskih i professional'nyh faktorov na sostojanie immunobiologičeskoj reaktivnosti organizma [en ruso]
Immunobiological changes found in seafarers employed on board ships operating in tropical areas can be the source of numerous diseases. Measurements of non-specific immunity factors (complement, lysozyme, phagocytes) were made on albino rats carried on board a bulk carrier and a methane tanker, as well as on laboratory control animals. The animals which travelled in the tropical areas showed a distinct inhibition of immunological factors and an increase in the neutrophil phagocytic activity and in the number of plasmatic globules in the lymphatic mesentary ganglia.
Gigiena i sanitarija, Nov. 1973, No.11, p.39-42. 10 ref.
Construction work carried out in winter
Bauen im Winter [en alemán]
Preparations (structural plan, timetable, cost, work organisation, materials and equipment); characteristics of air and water heating equipment and steam generators; use of antifreeze products and hardening accelerators.
Verlag Tribüne, Am Treptower Park 28-30, 1193 , 1973. 54p. Illus. Price: M.2.20.
Rules for the prevention of accidents due to fires and explosions during underground work in rock strata where natural gas may be released
Rčgles relatives ŕ la prévention d'accidents dus ŕ des incendies et explosions lors de travaux souterrains dans des couches rocheuses dégageant du gaz naturel. [en francés]
These rules apply to all underground construction work during which natural gas may be released or which involve a hazard of this kind. Contents: general provisions (no smoking, rescue organisation); ventilation (permissible methane concentration, protection against firedamp, ventilation breakdown, measurement team); winning with explosives (boring, explosion fumes, measurements after blasting); winning with heading machines. Comments are appended.
Form. 1497, Swiss National Accident Insurance Institute (Schweizerische Unfallversicherungsanstalt), Luzern, Switzerland, Nov. 1972. 7p.
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