What is the structural efficiency of a riveted joint detailed with minimum IS : 800 pitch_________________?
Show answer Hide answer
Answer: C. 60%
Explanation
A riveted joint designed with the minimum pitch specified in IS 800 typically achieves a structural efficiency of 60%. Fastener holes remove cross-sectional area, reducing the net tensile capacity of the connected steel plate. The 60% efficiency figure reflects the balance between plate weakening and rivet capacity at minimum pitch. Joint efficiency measures the load-bearing capacity of a fastened connection relative to the solid un-perforated plate. Rivet pitch and edge distances dictate how much cross-sectional area remains at the critical net section. Standard design codes mandate specific fastener spacings to optimize joint strength and prevent tearing.
Option A proposes 40%, which underestimates the typical net-section efficiency of standard riveted joints. Option B suggests 50%, which is lower than the standard value achieved with IS 800 minimum pitch. Option D suggests 70%, which overestimates the net section capacity remaining after drilling minimum pitch holes.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Structural bolts are most efficient when subjected to_________________?
Show answer Hide answer
Answer: C. axial tension
Structural bolts and high-strength fasteners achieve highest efficiency when resisting direct axial tension. Tension connections utilize the full tensile capacity of the bolt shank without introducing complex shear stres...
Q2. Countersunk-head rivets loaded in tension are assigned a tensile capacity of____________________?
Show answer Hide answer
Answer: B. reduced by 33.3%
Countersunk head rivets subjected to tensile loads have their capacity reduced by thirty three point three percent. The countersunk tapering reduces the effective shank grip length and cross sectional area available to r...
Q3. According to IS:800 plastic design guidelines, which combination of Working Loads and Load factor is properly paired________________?
Show answer Hide answer
Answer: A. (i) and (ii) are correct
Plastic design guidelines under IS 800 establish proper working load combinations and load factors as stated in points (i) and (ii). These paired combinations ensure that structures possess adequate safety margins agains...
Q4. Per IS:800, what numerical value is assigned to the imperfection index (n) in the Merchant-Rankine formula_______________?
Show answer Hide answer
Answer: B. 1.4
IS 800 assigns an imperfection index value of 1.4 for use in the Merchant-Rankine column formula. This empirical index accounts for initial geometric crookedness and residual stresses present in structural steel members....
Q5. Bridge rocker bearing pins are engineered to withstand_________________?
Show answer Hide answer
Answer: D. bearing, shear and bending
Bridge rocker bearing pins must safely transmit heavy vertical loads and rotations. This dual functional requirement demands simultaneous resistance against bearing, shear, and bending. Engineers design these pins to wit...
Q6. Gantry crane girders are engineered to withstand_________________?
Show answer Hide answer
Answer: C. lateral, longitudinal and vertical loads
Gantry crane girders are subjected to complex multi-directional forces during lifting and moving operations. They must withstand lateral forces from trolley movement, longitudinal forces from braking, and vertical gravit...