Standard Schedule for Grading Cities and Towns of the United States: With Reference to Their Fire Defenses and Physical Conditions. Adopted December 14, 1916
National Board of Fire Underwriters, 1917 - Fire insurance - 78 pages
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1/20 Deficiency Scale 60 pounds Add i/io Deficiency adequacy alarm circuits average basis boilers box circuit City or Town Class City decreases the deficiency deficiency applied deficiency under Item direct hydrant streams electric engine capacity available engine companies engine or hose equipment exceed Extra high tension fire alarm fire department fire flow required fire protection fire stations fire walls fireboat full Deficiency Scale grade hazard High Pressure Fire high value district hose companies i/io Deficiency Scale inadequate independent gates J4 Deficiency ladder company less maximum consumption National Electrical Code number of buildings number of companies operation overhead lines pipe points of deficiency poor condition population Pressure Fire System pumping station Reduce points reliability required fire flow residential districts sections sidered sprinklered square feet storage street STRUCTURAL CONDITIONS telephone exchange tests tion total built-on area total number transmission Unsprinklered value district considered Water Supply wires Ys Deficiency
Page 4 - AUirms by Department. 6. Normal Adequacy of Entire System. 7. Reliability of Source of Supply. 8. Sufficiency of Reserve Pump Capacity. 9. Sufficiency of Reserve Boiler Capacity. 10. Condition and Arrangement of Equipment. 11. Fuel Supply or Electric Power. 12. Construction of Pumping Station. 13. Fire Protection of Pumping Station. 14. Hazards of Pumping Station. 15. Exposures to Pumping Station. 16. Reliability of Supply Mains as Affecting Adequacy. 17. Reliability of Installation of Supply Mains....
Page 2 - In determining the points of deficiency to be applied to many of the items, it appears reasonable to use a graduated scale of points depending upon the per cent. of deficiency, with a lesser increment for the first 30 per cent. than for the remainder ; that is, a deficiency of 10 per cent. in good or moderately good conditions has less actual effect than where conditions are poor. Such a scale has been prepared and is given below; either the full scale, a multiple or a fractional part thereof is...
Page 4 - Mains. 23. Completeness of Gridiron of 6-inch Mains. 24. Quality and Condition of Pipe. 25. Electrolysis. 26. Spacing of Gate Valves. 27. Condition of Gate Valves. 28. Distribution of Hydrants in the High Value District Considered 29. Ditto in Residential districts. 30. Condition of Hydrants. 31. Size and Design of Hydrants. 32. Valves on Hydrant Branch.
Page 1 - Schedule is based upon the plan of assigning to the various features of fire defense found in cities of the United States, points of deficiency depending upon the extent of variance from standards formulated from a study of conditions in more than 500 cities; the natural and structural conditions which increase the general hazard of cities, and the lack of laws or of their enforcement for the control of unsatisfactory conditions, are graded in the same way. The sum of the maximum points of deficiency...
Page 15 - ... considered with respect to the ability to deliver water at direct hydrant stream pressure; except that if fire engines are available gradings of Items 8 and 16 may be on the basis of quantities obtainable at 20 pounds, but not to exceed a fire flow, at times of maximum domestic consumption, equal to J the fire flow required, assumed as waste, plus the available engine capacity.
Page 69 - ... the distance to the nearest buildings. Wharf district boundaries to extend from end of pier to end of pier, where piers are continuous along the water front, and slip area to be counted as open area. Narrow streets, inaccessibility of buildings, congestion of the district and of the individual blocks, poor general structural conditions and exposures from surrounding sections all increase the probability of sweeping fires. Buildings of fireproof construction, sprinklered brick buildings, fire...
Page 1 - It is recognized that climatic conditions affect fire losses, by reason of the frequency of fires due to the heating hazard, by retarding the response of fire apparatus, by hampering effective fire fighting during cold weather and storms, by the increase in combustibility due to hot and dry weather, and by the greater probability of fires spreading at time of high winds.
Page 64 - There shall be prescribed fire limits, including all closely built mercantile and adjoining manufacturing districts and surrounding blocks on all sides which constitute an exposure to the district or within which new construction of a mercantile or manufacturing character is developing; within these limits, frame construction shall be prohibited.
Page 8 - Barriers. 2. Street Widths. 3. Accessibility of Block Interior. 4. Per Cent. of Area in Streets and Open Spaces. 5. Per Cent. of Block Area Built Upon. 6. Heights of Buildings Other than Fireproof. 7. Large and Excessive Areas Other than Frame. 8. Deficient Party and Fire Walls. 9. Unprotected Floor Openings. 10. Unprotected Exposed Openings. 11. Frame Buildings. 12. Permanent Awnings and non-fire-resistive roof coverings.
Page 32 - ... the companies have engines, use engine basis. 30. CONDITION of HYDRANTS. — Hydrants shall be inspected in the spring and fall of each year, after use at fires during freezing weather and daily in high value districts during protracted periods of severe cold.