SI'K( IKK ATIO.NS. 



383 



inli -t .in.l outlet pipes of the sizes specified by the owner. All openings in stand-pipes shall be 

 I >[.>! -rly rvintoirrd by forged rings or plates. 



22. For stiffening angles, etc., see Part I, Sections 32 and 33. 



23. In cases where a roof is used see Section 5; Sections 34, 35, and 36 of Part I should also 

 be followed. 



24. There shall be an outside ladder, I ft. 3 in. wide, extending from a point about 8 ft. above 

 thr found. ition to the top of the stand-pipe. The ladder shall be made of two 2\ by | in. bars with 

 I in. round rungs i ft. apart. An inside ladder will not be required. (In no case should inside 

 ladders be provided on stand-pipes in climates where ice will form. Owners of oil tanks often 

 spivii'y stairways to take the place of ladders.) All ladders shall be able to sustain a concentrated 

 load of at least 800 Ib. 



25. Large stand-pipes for oil storage, the heights of which are very small compared with 

 their diameter, will generally be set directly on a sand foundation, and will not need any anchorage 

 whatever, as the overturning moment is very small in comparison with the resisting moment. 



26. Stand-pipes of the ordinary type, for water storage, shall be set on concrete foundations, 

 and shall be anchored thoroughly thereto with anchor-bolts not less than ij in. in diameter, 

 set deep enough to take the necessary uplift, and provided with an anchor plate not less than i in. 

 thick in the masonry. All anchor bolts shall be connected directly to the sides of the stand-pipe 

 with bent plates or similar details. The unit stress in anchor-bolts shall not exceed 15,000 Ib. 

 per sq. in. of net area. See Part I, Section 43. 



27. All detailed drawings shall be subject to the owner's approval before work is commenced. 



28. For materials, workmanship, inspection, painting, and testing, see Part III; for founda- 

 tions, see Part IV. 



PART III. MATERIALS, WORKMANSHIP, INSPECTION, PAINTING, AND TESTING. 



Structural Steel. i. The steel shall be made by the open-hearth process. 



2. The chemical and physical properties shall conform to the following limits: 



The yield point, as indicated by the drop of beam, shall be recorded in the test reports. 



3. If the ultimate strength varies more than 4,000 Ib. from that desired, a re-test shall be 

 made on the same gage, which to be acceptable, shall be within 5,000 Ib. of the desired ultimate. 



4. Chemical determination of the percentages of carbon, phosphorus, sulphur, and manganese 

 shall be made by the manufacturer from a test ingot taken at the time of the pouring of each 

 melt of steel, and a correct copy of such analysis shall be furnished to the engineer or his inspector. 

 Check analyses shall be made from finished material, if called for by the purchaser, in which case 

 an excess of 25 per Cent above the required limits will be allowed. 



5. Specimens for tensile and bending tests, for plates, shapes, and bars, shall be made by 

 cutting coupons from the finished product, which shall have both faces rolled and both edges 

 milled to the form shown by Fig. I ; or with edges parallel ; or they may be turned to a diameter 

 of } in. for a length of at least 9 in. with enlarged ends. 



6. Rivet rods shall be tested as rolled. 



7. Specimens shall be cut from the finished rolled or forged bar, in such manner that the 

 center of the specimen shall be I in. from the surface of the bar. The specimen for the tensile 

 test shall be turned to the form shown by Fig. 2. The specimen for the bending test shall be I in. 

 by $ in. in section. 



8. Material which is to be used without annealing or further treatment shall be tested in the 

 condition in which it comes from the rolls. When material is to be annealed, or otherwise treated 



