Works in iron; Bridge and roof structures - Softcover

Matheson, Ewing

Softcover

ISBN 10: 113013718X ISBN 13: 9781130137187

Verlag: RareBooksClub.com, 2012

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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. 1877 Excerpt: ... of the columns is made in two lengths, united by faced flanges and eight 1 in. bolts. The lower length of column has cast upon it a screw 3 ft. 3 in. diameter, and below the screwblade the end of the column is serrated, as shown in Fig. 2, page 28. The two columns of each pier are braced together by horizontal cast iron struts and wrought iron diagonal ties. The tops of the three columns in each pier are connected by a I wrought iron girder 21 ft. 7 in. long, 18 in. deep, having a web, and each flange is formed of a plate 12 in. by in., united to the web by L irons 4 x 4 x. This girder acts as a sill to receive the main girders forming the superstructure of the bridge. There are in each span six similar main girders, as shown in the cross section, Fig. 2. Each girder is 2 ft. 6 in. deep, having a web, an upper flange formed of a plate 14 in. by-fa in., and a lower flange of a plate 12 in. by $ in., united to the web by L irons 4 x 4 x. The wtb is stiffened at intervals of 6 ft. 6 in. by vertical T irons, 6 x 3 x The main girders are braced together at intervals of 13 ft. by cross bracing of 4 in. x 4 in. x in. L irons, as shown in section, Fig 2. The platform of the bridge is formed of curved plates with the convex side downwards, each plate being 6 ft. 6 in. x 3 ft. 4 in. x A in. thick, riveted to the main girders; and upon this floor concrete and macadam together about 15 or 16 in. thick are placed. An outer curb or cornice of cast iron, 18 in. deep, retains the macadam, and forms a base for the parapet, which is formed of a light lattice framework, 3 ft. high, with cast iron ornaments riveted on, and with a cast iron handrail. This bridge was calculated to carry safely a dead load of about 150 lbs. per square foot of concrete and macadam, and a moving l...

Über diese Auflage

• Verlag: RareBooksClub.com
• Erscheinungsdatum: 2012
• ISBN 10: 113013718X
• ISBN 13: 9781130137187
• Einband: Tapa blanda
• Anzahl der Seiten: 104