International Building Code 2108.1
General. The design of masonry structures using
strength design shall comply with Section 2106 and the
400 2006 INTERNATIONAL BUILDING CODE
MASONRY
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requirements of Chapters 1 and 3 of ACI 530/ASCE 5/TMS
402, except as modified by Sections 2108.2 through 2108.4.
Exception: AAC masonry shall comply with the requirements
of Chapter 1 and Appendix A of ACI 530/ASCE
5/TMS 402.
International Building Code 2108.2
ACI 530/ASCE 5/TMS 402, Section 3.3.3.3 development.
Add the following text to Section 3.3.3.3:
The required development length of reinforcement shall be
determined by Equation (3-15), but shall not be less than 12
inches (305 mm) and need not be greater than 72 db.
International Building Code 2108.3
ACI 530/ASCE 5/TMS 402, Section 3.3.3.4, splices.
Modify items (b) and (c) of Section 3.3.3.4 as follows:
3.3.3.4 (b). A welded splice shall have the bars butted and
welded to develop at least 125 percent of the yield strength,
y, of the bar in tension or compression, as required.Welded
splices shall be of ASTM A 706 steel reinforcement.
Welded splices shall not be permitted in plastic hinge zones
of intermediate or special reinforced walls or special
moment frames of masonry.
3.3.3.4 (c). Mechanical splices shall be classified as Type 1
or 2 according to Section 21.2.6.1 of ACI 318. Type 1
mechanical splices shall not be used within a plastic hinge
zone or within a beam-column joint of intermediate or special
reinforced masonry shear walls or special moment
frames. Type 2 mechanical splices are permitted in any location
within a member.
International Building Code 2108.4
ACI 530/ASCE 5/TMS 402, Section 3.3.3.5, maximum
areas of flexural tensile reinforcement. Add the following
text to Section 3.3.3.5:
3.3.3.5.5 For special prestressed masonry shearwalls, strain
in all prestressing steel shall be computed to be compatible
with a strain in the extreme tension reinforcement equal to
five times the strain associated with the reinforcement yield
stress, fy. The calculation of the maximum reinforcement
shall consider forces in the prestressing steel that correspond
to these calculated strains.