scope:

This Standard specifies requirements for the welding of steel structures made up ofcombinations of steel plate. sheet or sections. including hollow sections and built-upsections, or castings and forgings. by the following processes:

(a) Manual metal-arc welding (MMAW).

(b) Submerged arc welding (SAW).

(c) Gas metal-arc welding (GMAW or MIG), including pulsed mode.

(d) Gas tungsten-arc welding (GTAW or TIG).

(e) Flux-cored arc welding (FCAW).

(f) Electroslag (including consumable guide) welding (ESW).

(g) Electrogas welding (EGW).The Standard is limited to the welding of steel parent material with a specified minimumyield strength not exceeding 500 MPa.

The Standard applies specifically to the welding of steelwork in structures complying withAS 3990, AS 4100 or NZS 3404.1. Where welded joints in these stmctures are governed bydynamic loading conditions, the Standard applies only to those welded joints that complywith the fatigue provisions of AS 3990, where the stress range in the welded joint is greaterthan 30% of the permissible stress range for Category B of AS 3990. or exceeds the stressrange permitted for detail Category 112 of AS 4100 or NZS 3404.1, but does not exceed themaximum stress ranges permitted for these categories.

NOTE: Fillet welds and incomplete penetration butt welds may be used in AS 4100 orNZS 3404.1 detail Category 125, and in Category B fatigue applications of AS 3990 when thedirection of the weld is parallel to the direction of the applied stress.

in addition to the abovementioned structures, the Standard applies to the welding ofbridges, cranes. hoists. other dynamically loaded structures and steelwork in applicationsother than structural.

NOTES:

1 Further information on this Standard is given in WTIA Technical Note 11.

2 It is expected that welds covered by this Standard will not normally occur with struauressuch as buildings, tanks or silos, but only in certain classes of machinery and transport equipment.

3 GMAW includes waveform controlled welding such as iynergici programmablei andmicroprocessor oontrolledi processes, e.g. pulsed spray transfer, controlled short circuit transfer.