Working stress approach (legacy practice): What is the typical permissible bearing stress in steel (for bearing of fasteners on connected steel) used in traditional working-stress design problems?

Introduction / Context:Before the widespread adoption of limit-state design, many exam problems and legacy references used working-stress values for riveted or bolted connections in steel. One such property is the permissible bearing stress of steel under fastener bearing.

Given Data / Assumptions:

• Old working-stress method context for steel connections.
• Permissible bearing stress refers to bearing of rivet/bolt on the connected plate (or vice versa) in mild steel.

Concept / Approach:Permissible bearing stress historically adopted in many Indian university and competitive exam problems is approximately 1890 kg/cm2 for standard steel quality and typical shop-driven rivets/bolts. These values ensured adequate safety under service loads, accounting for uncertainties of materials and construction.

Step-by-Step Solution:

Verification / Alternative check:Compare with shear/stress tables used alongside permissible tensile and shear stresses; bearing typically exceeded shear and was matched to plate thickness constraints to avoid tear-out and block shear.

Why Other Options Are Wrong:1500 kg/cm2 is on the low side for bearing; 2025–2340 kg/cm2 are higher than typical legacy permissible values; 2250 kg/cm2 appears in some contexts but not as the common teaching value for basic mild-steel bearing in standard problems.

Common Pitfalls:Mixing up limit-state design strengths with permissible stresses; misapplying bearing on bolt vs. plate.

Final Answer:1890 kg/cm2