I2.1 Protected Zone
A protected zone designated by these Provisions or ANSI/AISC 358 shall comply with the following requirements:
- (a) Within the protected zone, holes, tack welds, erection aids, air-arc gouging, and unspecified thermal cutting from fabrication or erection operations shall be repaired as required by the engineer of record (EOR).
- (b) Steel headed stud anchors shall not be placed on beam flanges within the pro- tected zone.
- (c) Arc spot welds as required to attach decking are permitted.
- (d) Decking attachments that penetrate the beam flange shall not be placed on beam flanges within the protected zone, except power-actuated fasteners up to 0.18 in. (4.6 mm) diameter are permitted.
- (e) Welded, bolted, or screwed attachments or power-actuated fasteners for perimeter edge angles, exterior facades, partitions, duct work, piping, or other construction shall not be placed within the protected zone.
Exception: Other attachments are permitted where designated or approved by the EOR. See Section D1.3.
User Note: AWS D1.8/D1.8M, clause 6.18, contains requirements for weld removal and the repair of gouges and notches in the protected zone.
I2.2 Bolted Joints
Bolted joints shall satisfy the requirements of Section D2.2.
I2.3 Welded Joints
Welding and welded connections shall be in accordance with AWS D1.8/D1.8M and Structural Welding Code—Steel (AWS D1.1/D1.1M), hereafter referred to as AWS D1.1/D1.1M.
Welding procedure specifications (WPS) shall be approved by the EOR.
Weld tabs shall be in accordance with AWS D1.8/D1.8M, clause 6.16, except at the outboard ends of continuity-plate-to-column welds, weld tabs, and weld metal need not be removed closer than ¼ in. (6 mm) from the continuity plate edge.
AWS D1.8/D1.8M clauses relating to fabrication shall apply equally to shop fabrication welding and to field erection welding.
User Note: AWS D1.8/D1.8M was specifically written to provide additional requirements for the welding of seismic force-resisting systems and has been coordinated wherever possible with these Provisions. AWS D1.8/D1.8M requirements related to fabrication and erection are organized as follows, including normative (mandatory) annexes:
- General Requirements
- Normative References
- Terms and Definitions
- Welded Connection Details
- Welder Qualification
- Fabrication
- Annex A. WPS Heat Input Envelope Testing of Filler Metals for Demand Critical Welds
- Annex B. Intermix CVN Testing of Filler Metal Combinations (where one of the filler metals is FCAW-S)
- Annex D. Supplemental Welder Qualification for Restricted Access Welding
- Annex E. Supplemental Testing for Extended Exposure Limits for FCAW Filler Metals
At continuity plates, these Provisions permit a limited amount of weld tab material to remain because of the reduced strains at continuity plates, and any remaining weld discontinuities in this weld end region would likely be of little significance. Also, weld tab removal sites at continuity plates are not subject to magnetic particle testing.
AWS D1.8/D1.8M, clause 6, is entitled “Fabrication,” but the intent of AWS is that all provisions of AWS D1.8/D1.8M apply equally to fabrication and erection activities as described in the Specification and in these Provisions.
I2.4 Continuity Plates and Stiffeners
Corners of continuity plates and stiffeners placed in the webs of rolled shapes shall be detailed in accordance with AWS D1.8/D1.8M, clause 4.1.