SPECIFICATIONS QUESTIONS &
ANSWERS
What's the minimum clear distance between 2 #6 vertical bars in a column? -
ANSWER1-1/2 inches
See section 5.11.1 of the RCM Handbook and Article 6.1.3 of the TMS 402 Code
Joint reinforcement has a minimum lap splice of: - ANSWER6 inches
See section 5.8.1 of the RCM Handbook and Article 3.4.B.10.b of the TMS 602
Specification
What type of rebar is usually required for weld splices? - ANSWERASTM A706
For an 8-inch multi-wythe cavity wall, what is the maximum size of rebar allowed using
the allowable stress design method? - ANSWER#8
See Table 5.1 of the RCM Handbook. 1/8 of an 8-inch wall is 1 inch, which is the
diameter of a #8 bar
What is the maximum allowable spacing for securing #4 bars in a masonry wall? -
ANSWERThere is no maximum spacing requirement.
See section 5.5 of the RCM Handbook. Current codes don't have a specific spacing
requirement, just that all bar is secure from displacement beyond allowable tolerances.
See section 5.7 of the RCM Handbook. Weld splices must develop 125% of the rebar
yield strength, which is 40,000 PSI for Grade 40 bars.
A vertical bar is specified to be placed in the center of an 8 inch thick CMU wall. How far
away from the center of the wall in the direction perpendicular to the length of the wall
can the bar actually be placed? - ANSWER1/2-inch
See section 5.6 and Figure 5.10 of the RCM Handbook. Also Article 3.4.B.11.a of the
TMS 602 Specification. d is less than 8 inches if the wall is only 8 inches thick.
What is the maximum height for a lightly-loaded column? - ANSWER12 feet.
See section 5.11.2 of the RCM Handbook as well as Section 5.3.2 of the TMS 402
Code