Page 264 - Structural Steel Designers Handbook AISC, AASHTO, AISI, ASTM, and ASCE-07 Design Standards

Brockenbrough_Ch05.qxd 9/29/05 5:12 PM Page 5.44

CRITERIA FOR BUILDING DESIGN

5.44 CHAPTER FIVE

TABLE 5.7 Available Strength of Welded Joints
Load type and direction Pertinent Nominal strength Required filler metal
relative to weld axis metal Φ and Ω (F bm or F w ) strength level a,b
Complete-joint-penetration groove welds

Tension: Strength of the joint is controlled by the Matching filler metal shall be used.
Normal to weld axis base metal. For tee and corner joints with backing
left in place, notch tough filler metal
is required.
Compression: Strength of the joint is controlled by the Filler metal with a strength level equal
Normal to weld axis base metal. to or one strength level less than
matching filler metal is permitted.
Tension or compression: Tension or compression in parts joined Filler metal with a strength level equal
Parallel to weld axis parallel to a weld need not be considered to or less than matching filler metal is
in design of welds joining the parts. permitted.
Shear Strength of the joint is controlled by the Matching filler metal shall be used. c
base metal.
Partial-joint-penetration grove welds including flare V groove and flare bevel groove welds

Tension: Base Φ= 0.90 F y Filler metal with a strength level equal
Normal to weld axis Ω= 1.67 to or less than matching filler metal
Weld Φ= 0.80 0.60F Exx is permitted.
Ω= 1.88
Compression: Compressive stress need not be considered
Column to base plate and column splices in design of welds joining the parts.
designed per J1.4(a)
Compression: Base Φ= 0.90 F y
Connections of members designed to Ω= 1.67
bear other than columns as described Weld Φ= 0.80 0.60F Exx
in J1.4(b) Ω= 1.88
Compression: Base Φ= 0.90 F y
Connections not finished-to-bear Ω= 1.67
Weld Φ= 0.80 0.90F Exx
Ω= 1.88
Tension or compression: Tension or compression in parts joined Filler metal with a strength level equal
Parallel to weld axis parallel to a weld need not be considered to or less than matching filler metal
in design of welds joining the parts. is permitted.
Shear Base See J4, AISC Specification
Weld Φ= 0.75 0.60F Exx
Ω= 2.0
Fillet welds including fillets in holes and slots and skewed tee joints

Shear Base See J4, AISC Specification Filler metal with a strength level equal
Weld Φ= 0.75 — to or less than matching filler metal
Ω= 2.0 0.60F Exx d is permitted.
Tension or compression: Tension or compression in parts joined
Parallel to weld axis parallel to a weld need not be considered
in design of welds joining the parts.
(Continued)

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