Section 47.—PLATE WORK.
[836]. Single riveted lap joint.
[837]. Double riveted lap joint.
[838]. Single riveted butt joint.
[839]. Double butt joint.
[840]. T-iron butt joint.
[841], [842], [843], & [844]. Angle or edge seams.
[845]. Transverse tubular seam.
[846], [847], & [848]. Reducing ring seams.
[849], [850], [851], & [852]. Bottom seams round water spaces, fire-boxes, &c.
[853]. Expansion hoop joint in boiler flues, &c.
[854] & [855]. Fire-box stays.
[856]. Gusset stay for flat ends.
Flat bar, tube, and round iron stays are also much used to stay flat surfaces in boilers and tanks.
In household boilers it is usual to weld all the seams, thus avoiding L iron and other riveted work. See [Nos. 89] to [96].
Flue tubes in boilers are stayed also by cross tubes inserted at intervals, such as Galloway’s patent conical cross tubes.
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[857] & [858]. Cover plates to carry tensile strains over joints in plates, L irons, &c.
[859], [860], [861], [862], & [863]. Various forms of joints employed in plate iron structures, boxes, tanks, &c., not subject to much strain. 863 is a dovetailed joint.
[864]. T or L iron strut end joint.
[865]. Junction of flat bar and diagonal T or L iron.
[866]. Gusset plate joint for diagonal ties and struts.
[867]. Mode of jointing boiler plate corners by tapering the corners of the plates.
[868]. Another form of angle joint.