When metal deck is to be welded to supports the effective fusion area is at least 1 2 in.
Weld washers for metal deck.
Weld washers used on 22ga or thicker steel may actually create a lower quality weld due to heat sinking and are not to be used or specified.
Metal deck is often installed using arc spot welds either with or without weld washers.
Weld washers are recommended for welding in deck panels thinner than 0 028 inches.
Weld washers per the sdi construction manual are required when welding metal thicknesses equal to or less than 24 gauge however are not recommend for steel deck heavier or thicker than 22ga.
Diameter for arc spot welds or at least 3 8 in.
Long for arc seam welds.
Western metal deck 616 s.
An excellent reference for additional information is the sdi white paper arc puddle welds and weld washers for attachments in steel deck available for free download from the sdi website.
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Ontario ca 91762 909 467 2016.