§ 723.11. Joint Types

For all bars No. 8 and larger, butt splices will be required. For No. 7 bars and smaller, lap splices will be required.

Fillet welds in lap splices shall be a minimum of 4 inches in length and shall be welded on each side of the lap joint. For bars No. 5 and smaller, welding from one side of the lap will be permitted by the Engineer, when it is impractical to weld from both sides of the joint, but in this case the weld shall be a minimum of 6 inches in length.

Lap welds shall conform to Table 5.

Where possible, all butt splices shall be made in the flat position. All welds for butt splices, except horizontal welds on vertical bars shall be as indicated. The backup strip will be required when access to the splice is from the top only. When bars may be rotated or access to the splice is available from two sides the double bevel splice may be made and this type weld requires gouging out the root pass similar to a flange splice on structural steel. The root pass may be made using E7010 electrodes for all double beveled splices and the root pass shall be completely removed prior to welding the opposite side. The steel shall be preheated to 400 F if E7010 electrodes are used. Horizontal splices, on vertical bars, shall be as indicated.

Table 5
Bar Size	a	b Maximum	t Minimum	c Maximum	Electrode Size
No. 4	.04 inch	1/8 inch	1/8 inch	1/16 inch	1/8 inch
No. 5	.05 inch	1/8 inch	3/16 inch	1/16 inch	5/32 inch
No. 6	.06 inch	1/8 inch		1/16 inch	5/32 inch
No. 7	.07 inch	3/16 inch	5/16 inch	1/16 inch	5/32 inch