2010 Construction and Material Specifications - Ohio Department of ...
2010 Construction and Material Specifications - Ohio Department of ... 2010 Construction and Material Specifications - Ohio Department of ...
513.13 513.13 Stiffeners. Place the bearing end of bearing stiffeners flush and square with the web and in a manner so at least 75 percent of the area of the bearing end is in contact with the inner surface of the flange. The other end of the bearing stiffener shall have a tight fit as defined below. Position bearing stiffeners to be vertical after erection. Weld intermediate stiffeners that are not used in pairs to the compression flange, and provide a tight fit for the tension flange. Weld intermediate stiffeners connected to cross frame angles to the top and bottom flange. A tight fit is defined as the contact between the stiffener and flange over some portion of the end of the stiffener and having no gap greater than 1/16 inch (1.6 mm). Clip stiffeners 2 1/2 inches (65 mm) along the web and 1 inch (25 mm) along the flange to clear flange-web welds and fillet or rolled shapes. When attaching stiffeners to the web and flanges, do not extend welds to the edge of the stiffeners or into the clip area. Terminate these welds 1/4 ± 1/8 inch at the flange connections and 1/2 ± 1/4 inch at the web connection. 513.14 Fillers. Detail the shop drawings to show fill plates that compensate for the misalignment of abutting elements due to differences in thickness of flanges and webs at the splice locations. Detail the fill plates to the nearest 1/16 inch (1.6 mm) in thickness, but not less than 1/8 inch (3 mm) thick. However, in the final shop assembly, furnish fills of sufficient thickness to compensate for misalignment of abutting elements due to standard rolling mill tolerances or due to differences in thicknesses of flanges and webs at the splice location. The actual fills used shall compensate for differences in total thickness or relative positions of more than 1/16 inch (1.6 mm) but with no fills less than 1/8 inch (3 mm) thick. Provide fill plates in bolted joints that are flush with the perimeter of the splice plates. 513.15 Horizontally Curved Beams and Girders. If members are to be heat curved, submit the detailed procedure, including necessary calculations, to the Office of Materials Management. Obtain the Office of Materials Management’s acceptance of the procedure before starting this work. Curve beams and girders using heat according to AASHTO Standard Specifications for Highway Bridges, except that the fabricator may cut flanges for girders to obtain the required alignment. 513.16 Joints and Splices. In bolted construction where tension or flexural members are spliced, maintain a clearance of not more than 1/4 inch (6 mm) between the abutting surfaces of spliced members. For spliced compression members, face the abutting surfaces to provide a uniform bearing when properly aligned and completely bolted. In welded construction, prepare abutting surfaces as shown on the shop drawings. Verify the preparation for field welded butt joints in main members by a complete shop assembly according to 513.24. 513.17 Pin Holes. Bore pin holes after the member is fabricated and true to size, at right angles to the axis of the member and parallel to each other. Pin holes 348
349 513.18 for up to 5-inch (127 mm) diameter pins shall not exceed the pin diameter by more than 0.020 inch (0.51 mm) and pin holes for larger pins shall not exceed the pin diameter by more than 0.031 inch (0.79 mm). 513.18 Pins and Rollers. Use pins and rollers made from cold rolled steel, accurately turned to size, straight and smooth, and entirely free from flaws. Pins over 9 inches (230 mm) in diameter shall be annealed. In pins larger than 9 inches (230 mm) in diameter, bore a hole not less than 2 inches (50 mm) in diameter the full length of the axis. Furnish one pilot and one driving nut for each size of pin. 513.19 Holes for High-Strength Bolts and Bearing Bolts. Provide cylindrical holes, perpendicular to the member, clean cut, and free of ragged edges. Remove burrs by countersinking not more than 1/16 inch (1.6 mm) or by grinding. Provide finished holes with a diameter not larger than the nominal diameter of the bolt plus 1/16 inch (1.6 mm). The hole diameter shall not vary by more than 1/32 inch (0.8 mm) from a true circle for 85 percent of the holes in a contiguous group, and not more than 1/16 inch (1.6 mm) for the remainder. Punch holes using a die with a diameter not exceeding that of the punch by more than 1/16 inch (1.6 mm). Ream and drill holes using twist drills and twist reamers. Wherever possible, direct the reamer by mechanical means. Sub-drill holes 3/16 inch (5 mm) less in diameter than the nominal diameter of the bolt, and ream the holes to size with the parts assembled, except: A. The fabricator may sub-punch main material conforming to ASTM A 709/A 709M, Grade 36 (250) steel that is less than 3/4 inch (19 mm) thick, and Grade 50 (345) or 50W (345W) steel that is less than 5/8 inch (16 mm) thick. B. The fabricator may drill full-size holes in materials assembled and adequately clamped together. C. The fabricator may punch full-size holes in secondary and detail material conforming to ASTM A 709/A 709M, Grade 36 (250) steel that is less than 3/4 inch (19 mm) thick, and Grade 50 (345) or 50W (345W) steel that is less than 5/8 inch (16 mm) thick. D. The fabricator may make assemblies such as floor beams connected to girders and rolled beam spans connected by diaphragms through steel templates. Place all sub-punched or sub-drilled holes with sufficient accuracy such that after assembling (before reaming) a cylindrical pin 1/8 inch (3 mm) smaller than the nominal size of the punched hole may be entered perpendicular to the face of the member without drifting in not less than 75 percent of the contiguous holes in the same plane. All holes shall allow a pin 3/16 inch (5 mm) smaller than the nominal size of the punched holes to be inserted in the above manner. Do not plug located holes without written approval from the Office of Materials Management. Provide steel templates with hardened bushings in holes that are accurately located in relation to the centerline of the connection as inscribed on the template. The fabricator is not required to use hardened bushings when using a roto-broach, shell drill, or other similar tool, to make the holes.
- Page 303 and 304: 297 506.03 limits of the footing 3
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349<br />
513.18<br />
for up to 5-inch (127 mm) diameter pins shall not exceed the pin diameter by more<br />
than 0.020 inch (0.51 mm) <strong>and</strong> pin holes for larger pins shall not exceed the pin<br />
diameter by more than 0.031 inch (0.79 mm).<br />
513.18 Pins <strong>and</strong> Rollers. Use pins <strong>and</strong> rollers made from cold rolled steel,<br />
accurately turned to size, straight <strong>and</strong> smooth, <strong>and</strong> entirely free from flaws. Pins<br />
over 9 inches (230 mm) in diameter shall be annealed. In pins larger than 9 inches<br />
(230 mm) in diameter, bore a hole not less than 2 inches (50 mm) in diameter the<br />
full length <strong>of</strong> the axis. Furnish one pilot <strong>and</strong> one driving nut for each size <strong>of</strong> pin.<br />
513.19 Holes for High-Strength Bolts <strong>and</strong> Bearing Bolts. Provide<br />
cylindrical holes, perpendicular to the member, clean cut, <strong>and</strong> free <strong>of</strong> ragged edges.<br />
Remove burrs by countersinking not more than 1/16 inch (1.6 mm) or by grinding.<br />
Provide finished holes with a diameter not larger than the nominal diameter <strong>of</strong> the<br />
bolt plus 1/16 inch (1.6 mm). The hole diameter shall not vary by more than 1/32<br />
inch (0.8 mm) from a true circle for 85 percent <strong>of</strong> the holes in a contiguous group,<br />
<strong>and</strong> not more than 1/16 inch (1.6 mm) for the remainder.<br />
Punch holes using a die with a diameter not exceeding that <strong>of</strong> the punch by<br />
more than 1/16 inch (1.6 mm). Ream <strong>and</strong> drill holes using twist drills <strong>and</strong> twist<br />
reamers. Wherever possible, direct the reamer by mechanical means.<br />
Sub-drill holes 3/16 inch (5 mm) less in diameter than the nominal diameter <strong>of</strong><br />
the bolt, <strong>and</strong> ream the holes to size with the parts assembled, except:<br />
A. The fabricator may sub-punch main material conforming to ASTM A 709/A<br />
709M, Grade 36 (250) steel that is less than 3/4 inch (19 mm) thick, <strong>and</strong> Grade 50<br />
(345) or 50W (345W) steel that is less than 5/8 inch (16 mm) thick.<br />
B. The fabricator may drill full-size holes in materials assembled <strong>and</strong><br />
adequately clamped together.<br />
C. The fabricator may punch full-size holes in secondary <strong>and</strong> detail material<br />
conforming to ASTM A 709/A 709M, Grade 36 (250) steel that is less than 3/4<br />
inch (19 mm) thick, <strong>and</strong> Grade 50 (345) or 50W (345W) steel that is less than<br />
5/8 inch (16 mm) thick.<br />
D. The fabricator may make assemblies such as floor beams connected to<br />
girders <strong>and</strong> rolled beam spans connected by diaphragms through steel templates.<br />
Place all sub-punched or sub-drilled holes with sufficient accuracy such that<br />
after assembling (before reaming) a cylindrical pin 1/8 inch (3 mm) smaller than<br />
the nominal size <strong>of</strong> the punched hole may be entered perpendicular to the face <strong>of</strong><br />
the member without drifting in not less than 75 percent <strong>of</strong> the contiguous holes in<br />
the same plane. All holes shall allow a pin 3/16 inch (5 mm) smaller than the<br />
nominal size <strong>of</strong> the punched holes to be inserted in the above manner.<br />
Do not plug located holes without written approval from the Office <strong>of</strong> <strong>Material</strong>s<br />
Management.<br />
Provide steel templates with hardened bushings in holes that are accurately<br />
located in relation to the centerline <strong>of</strong> the connection as inscribed on the template.<br />
The fabricator is not required to use hardened bushings when using a roto-broach,<br />
shell drill, or other similar tool, to make the holes.