ISBN: 9781236528438

edizione con copertina rigida

Candler Press. Hardcover. New. Hardcover. 116 pages. Dimensions: 8.6in. x 5.7in. x 0.6in.BUILDING SUPERINTENDENCE FOR STEEL STRUCTURES - A PRACTICAL WORK ON THE DUTIES OF A BUILDING SUP… Altro …

Candler Press. Hardcover. New. Hardcover. 116 pages. Dimensions: 8.6in. x 5.7in. x 0.6in.BUILDING SUPERINTENDENCE FOR STEEL STRUCTURES - A PRACTICAL WORK ON THE DUTIES OF A BUILDING SUPERINTENDENT FOR STEEL-FRAME BUILDINGS AND THE PROPER METHODS OF HANDLING THE MATERIALS AND CONSTRUCTION by EDGAR S. BELDEN. INTRODUCTION: THE problems of superintendence of steel frame structures aie JL so different from those which arise in connection with other types of buildings that it has been necessary for men to make a specialty of building superintendence for steel buildings. The knowledge of the best types of design, the proper methods of fabrication, the tests which should be connected for quality of steel, and finally the proper methods of erecting the steel, all call for special training apart from the usual building superintendence methods. It is with the idea of giving engineer and layman the most authoritative information on this important subject that this little volume has been published. It does not attempt to go into the theory of design of steel structures, but confines itself to the problems of superintendence alone. The author is abundantly quali- fied to speak on this subject as he has erected many steel buildings for one of the biggest contracting firms in the country. He has given the reader the benefit of his experience as a superintendent by outlining the duties of this office, and making clear the engineering, legal, and practical knowledge required. Then he goes into detail regarding the inspection of the steel material in the fabrication shops and the proper method of storing it until needed. The problems of erection are all treated equipment required, foundations, the handling of the steel, riveting, and painting. The author closes the article with some advice as to the proper organization of his force, how the superintendent should work with architect and owner and what qualities a good superintendent should possess. Altogether the article should prove a valuable addition to the technical literature in this field. Contents include: Introduction 1 Classes of structures 1 Structural steel 1 Good design 2 Divisions of work 2 General superintendence problems 5 Reconciling theory and practice 5 Value of forethought 5 Judgment in handling mistakes 5 Theories of designing engineer vs. actualities of contractor 6 Problem of handlingmen 6 Progress charts 8 Shifting character of contractors organization 8 Handling business details 9 Value of business methods with businessmen 9 Appointments Contractors payments Superintendents rulings Purchases Legal points encountered 11 Importance of legal knowledge 11 Rudiments of law 11 Field of private law 12 Contracts 12 Agency 16 Liability law 18 Building laws 18 Lien laws 18 Application of the law 19 Duties regarding drawings 20 Draftsmanship and superintendence compared 20 Knowledge of drawings important 20 Accuracy of drawings 21 Supplying workmen with drawings 21 Handling drawings 21 Classes of drawings 22 Conflict in requirements 23 Inspection of material and erection of steel work 24 Mill inspection Knowledge necessary for mill inspector Cast iron Wrought iron Steel Necessity of mill inspection 10 10 10 11 24 24 25 26 27 30 Inspection of material and erection of steel work Continued Shop inspection 30 Amount of inspection varies with work 30 Drawings in shop 31 Shop processes 31 Reports 38 Inspection and superintendence of erection 38 Kinds of structure 38 Different methods of erecting steel . . . This item ships from multiple locations. Your book may arrive from Roseburg,OR, La Vergne,TN., Candler Press, RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 360 pages. Dimensions: 9.7in. x 7.4in. x 0.8in.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1884 Excerpt: . . . hoops and breech-pieces, and the Board finds that with the adoption of the system of breech-loading there is a positive move to the use of steel for all parts of their gun construction. The guns under construction at the Woolwich Gun Factories indicate that this conclusion has been accepted by the Government, though the differences perceptible in some of them show the gradual growth of the developed idea. For example, though the 12-inch 43-ton gun of latest order is composed entirely of steel, there are other guns of the same caliber and weight which have aportion of their hoops made of wroughtiron coils. There is no doubt, however, that the use of wrought iron and the system of muzzle-loading have been abandoned. In addition to the 12-inch 43-ton steel guns, there are in hand 13-inch 62-ton steel guns; also 10-inch 26-ton steel guns designed to throw a projectile of 500 pounds with an initial velocity of 2, 100 feet. Much interest is also felt in the success of the 9. 2-inch 18-ton steel gun, which is designed to supersede in sea service the present 10-inch 18-ton wroughtiron muzzle-loader. Four 8-inch llj-ton steel guns are being manufactured in the Koyal Gun Factories; two of them will be 30 calibers in length and two will be 26 calibers in length, the shorter being intended for sea service. Breech-loading guns of 6-inch, 5-inch and 4-inch calibers are also now constructed of steel. In this transition from wrought iron to steel it must be particularly noted that the change as thus far made in large guns consists in the substitution of coiled steel for coiled wrought iron; the reason for taking this intermediate step being the want of experience at the Royal Gun Factories in the manufacture of solid steel hoops, and the greater certainty of the manufacture . . . This item ships from La Vergne,TN., RareBooksClub, RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 470 pages. Dimensions: 9.7in. x 7.4in. x 0.9in.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 Excerpt: . . . of wrought iron we get a range of from 1 640 to 7 535. The highest test of steel is over 9 000 inch-pounds and the lowest is 1 550 inch-pounds. In Melt No. 743 we get practically the same results with metal of different thicknesses, while in Melt No. 757 the thicker metul makes a poorer showing. This may be due to the thicker plate having been finished in the rolls at too great a heat. A study of all the values given in Table No. 4 indicates that the resilience per square inch is not proportional to the ultimate strength, nor to the proportionate elongation, nor to the product of the two. We note, too, that the proportionate range in value is greater for the resilience than for either ultimate strength or elongation. Conclusion. In conclusion we may review the work briefly. The tests given were made by a new method of breaking small specimens in tension by impact. We find that there are two important errors which may be said to be peculiar to the method of testing. We find the first of these or the error due to inertia, theoretically determinate. We find that the second of these errors or that due to the spring of the fork-bar is determinate to the degree that the tensile strength of the specimen is known. The other errors in the method are those common to all impact tests. We find that the results obtained are determined by the form of the specimen, and are hence only comparative. We find that the tests that have been made by this method indicate that the resilience or shock resistance of rolled steel cannot be predicted from the tensile strength and elongation. The values obtained will of course have but little other meaning until they have been interpreted by experience and by further experiment. It is suggested, however, that in time, tests of this sort. . . This item ships from La Vergne,TN., RareBooksClub, RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 502 pages. Dimensions: 9.7in. x 7.4in. x 1.0in.This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1898 edition. Excerpt: . . . this bolster is 550 pounds, complete with truss-rod supports. The experience of the Rock Island people had convinced them that a successful draft rigging, as used in their freight equipment, must be longer than to the Second test--Load, 50 tons; 21-32 inch deflection; I 3-32 inch permanent set. The permanent set of test 2 was largely in the part between the side bearings. The tie bar also gave considerably at the hooks on end, as shown by their bending backward. The blocking of the ends was then moved farther in, being nearly over the side bearings on each side, with 4 feet 8 inches between centers; pressure was then applied so as to rupture the bolster, which occurred at 75 tons pressure, and with an additional deflection of about 15-16 inch just before breaking. The fracture occurred at the same time in both top and bottom longitudinal ribs above and below the space for draftwoods, at the outside corners, and also the corners on same side where reinforce for center pin and plate fills in between the ribs. road, that the wrought-iron bolster, as generally constructed and used almost exclusively in their freight equipment, could tiot carry the load without resting heavily on the side bearings, and the result of this was sharp flanges. Mr. Wilson made up his mind to make another effort to accomplish an improvement, and gave the problem to his chief draftsman, Mr. G. A. Akerlind. for solution. Mr. Akerlind and his promising young assistant. Mr. J. T. Carroll, set to work, and after much study as to the use of cast steel or malleable iron for their purpose, finally came to the design as shown by drawings. This bolster, as will be noticed, can take the place of the old wrought-iron bolster, and aUo allow the use of the long draft timbers, . . . This item ships from La Vergne,TN., RareBooksClub, RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 502 pages. Dimensions: 9.7in. x 7.4in. x 1.0in.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt: . . . safe. In addition to a mastery of the fundamental principles of welding, in the application of the process it is essential that the characteristics of each metal concerned be well understood and always borne in mind. Careful consideration of expansion and contraction in all stages of the work, and of oxidation in its manifold aspects, depending on the metal under treatment, are vital fundamentals. The range of metals which can be successfully treated by this process is very wide, including cast iron, wrought iron, steel, aluminum, copper, bronze, brass, lead, zinc, silver, gold. Glass has likewise been successfully welded. HISTORICAL DEVELOPMENT. Oxy-acetylene welding in its present application may be considered to be a modern development. In 1895 Le Chatelicr read a paper before the Academie des Sciences of Paris in which he stated that Acetylene burned with an equal volume of oxygen gives a temperature which is 1, 000 C. (1, 800 F. ) higher than the oxy-hydrogcn flame. The products of the combustion are carbon monoxide and hydrogen which are reducing agents. He likewise stated that This double property makes the use of acetylene in blowpipes of very great value for the production of high temperatures in the laboratory. His statement was specially noteworthy in that he set the ratio of gases at equal volumes and not at the theoretical proportion of volumes of oxygen to 1 of acetylene. To Edmond Fouche, of Paris, an engineer of the Compagnie Franchise de F Acetylene Dissous, belongs the credit of having devised the first really practical and safe torch. He began experimenting in 1901 and about two years later put out the first torches used commercially. He was in communication with Mr. Bournonville, of Xew York, and sent hi. . . This item ships from La Vergne,TN., RareBooksClub, Cambridge University Press. Paperback. New. Paperback. 1010 pages. Dimensions: 9.2in. x 6.3in. x 2.1in.David Mushet (1772-1847) was a self-taught Scottish metallurgist, who experimented with the making of iron and steel while working as an accountant for a foundry, and soon became an acknowledged authority on the subject. In 1800 he patented a method to make cast steel from wrought iron. His discovery that the previously ignored black-band ironstone could be used without additional coal to economically manufacture iron transformed the Scottish iron industry. Moving to England he was connected with several foundries where he continued his research, patenting a method of making refined iron in the blast furnace. He became a managing director of the British Iron Company, and was involved in collieries, railway and canal companies. Mushet was a pioneer in technical writing, publishing many papers in the Philosophical Magazine. This two-volume collection was published in 1840, and includes analytical data on many coals and their coking properties. This item ships from multiple locations. Your book may arrive from Roseburg,OR, La Vergne,TN., Cambridge University Press, RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 888 pages. Dimensions: 9.7in. x 7.4in. x 1.8in.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 edition. Excerpt: . . . that railway across the Menai Strait. It was required by the British Admiralty that these bridges--called the Britannia and the Conway--should be constructed so as not to interfere with navigation, with clear spans of upward of 400 feet. The longest arcli spans that had previously been constructed did not exceed 240 feet, and suspension bridges, as built at that date, not being suitable for heavy and rapid railway traffic, the engineers were obliged to devise some new form which should conform to the stipulated conditions. Mr. Stephenson, having decided on the tubular form, proceeded, in conjunction with Mr. Fairbairn, to make an elaborate series of experiments on tubes, to determine the most suitable arrangement of the wrought iron of which they were composed. They found that a rectangular tube, of which the top and bottom were cellular, gave the greatest strength with the least material. The span of the Conway tube was 400 feet, while the tubular part of the Britannia Bridge consisted of two spans of 460 feet and two of 230 feet each in the clear. The foundation stones of these bridges were laid in 1846 and 1847, respectively. In 1854 work was begun on the most important tubular bridge ever built--the Victoria Bridge over the Saint Lawrence River, near Montreal, Canada. The total length of this bridge is 9144 feet, or nearly 1 miles, and it was built in 24 spans of from 242 to 247 feet each, and one of 330 feet. About 9000 tons of iron were used in the tubes. In 1898-99 this bridge was replaced by a pin-connected truss bridge having 24 spans of 254 feet and one span of 348 feet, and requiring 20, 000 tons of steel in its construction. The Victoria Bridge was the last important tubular girder bridge to be built. By the date of its completion, in. . . This item ships from La Vergne,TN., RareBooksClub<