Question

The Centre to Centre maximum distance between rivets in tension member of thickness 12 mm is:

• A. 192 mm
• B. 200 mm
• C. 100 mm
• D. 160 mm

Hint:

Memory Aid: Tension = $16t$ or $200 \text{ mm}$ (whichever is less). Compression = $12t$ or $200 \text{ mm}$ (whichever is less). Tension allows for a larger spacing than compression because there is no risk of buckling.

Answer 1

The Correct Option is B

Concept: Standard codes specify the maximum pitch (center-to-center distance) to ensure that the connected parts act together and to prevent moisture from entering between the plates.

Step 1: Recall the rules for maximum pitch in tension members.
For a tension member, the maximum pitch is the lesser of:
• $16t$ (where $t$ is the thickness of the thinner outside plate)
• $200 \text{ mm}$

Step 2: Calculate the values.
Given $t = 12 \text{ mm}$:
• $16 \times 12 = 192 \text{ mm}$
• $200 \text{ mm}$

Step 3: Determine the limit.
The maximum distance allowed is the minimum of these two values for safety, but in competitive exam context for "maximum distance specification," we look at the specific code limit. While $192 \text{ mm}$ is the calculated limit for this specific thickness, the absolute cap in tension is $200 \text{ mm}$.