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MASONRY
tile work shall be installed in accordance with ANSI the requirements of Chapters 1 through 8 of TMS 402/ACI
A108.10. 530/ASCE 5 except as modified by Sections 2107.2 through
2107.4.
2103.2.4 Mortar for adhered masonry veneer. Mortar
for use with adhered masonry veneer shall conform to 2107.2 TMS 402/ACI 530/ASCE 5, Section 8.1.6.7.1.1, lap
ASTM C270 for Type N or S, or shall comply with ANSI splices. As an alternative to Section 8.1.6.7.1.1, it shall be
¬ A118.4 for latex-modified Portland cement mortar. permitted to design lap splices in accordance with Section
2103.3 Grout. Grout shall comply with Article 2.2 of TMS 2107.2.1.
602/ACI 530.1/ASCE 6.
2107.2.1 Lap splices. The minimum length of lap splices
2103.4 Metal reinforcement and accessories. Metal rein-
forcement and accessories shall conform to Article 2.4 of for reinforcing bars in tension or compression, ld, shall be
TMS 602/ACI 530.1/ASCE 6. Where unidentified reinforce-
ment is approved for use, not less than three tension and three ld = 0.002db fs (Equation 21-1)
bending tests shall be made on representative specimens of
the reinforcement from each shipment and grade of reinforc- For SI: ld = 0.29db fs
ing steel proposed for use in the work.
but not less than 12 inches (305 mm). In no case shall the
SECTION 2104
CONSTRUCTION length of the lapped splice be less than 40 bar diameters.
2104.1 Masonry construction. Masonry construction shall where:
comply with the requirements of Sections 2104.1.1 and
¬ 2104.1.2 and with TMS 602/ACI 530.1/ASCE 6. db = Diameter of reinforcement, inches (mm).
2104.1.1 Support on wood. Masonry shall not be sup- fs = Computed stress in reinforcement due to design
ported on wood girders or other forms of wood construc- loads, psi (MPa).
tion except as permitted in Section 2304.12.
In regions of moment where the design tensile stresses
2104.1.2 Molded cornices. Unless structural support and in the reinforcement are greater than 80 percent of the
anchorage are provided to resist the overturning moment, allowable steel tension stress, Fs, the lap length of splices
the center of gravity of projecting masonry or molded cor- shall be increased not less than 50 percent of the minimum
nices shall lie within the middle one-third of the support- required length. Other equivalent means of stress transfer
ing wall. Terra cotta and metal cornices shall be provided to accomplish the same 50 percent increase shall be per-
with a structural frame of approved noncombustible mate- mitted. Where epoxy coated bars are used, lap length shall
¬ rial anchored in an approved manner. be increased by 50 percent.
SECTION 2105 2107.3 TMS 402/ACI 530/ASCE 5, Section 8.1.6.7, splices
QUALITY ASSURANCE of reinforcement. Modify Section 8.1.6.7 as follows:
2105.1 General. A quality assurance program shall be used 8.1.6.7 – Splices of reinforcement. Lap splices, welded
to ensure that the constructed masonry is in compliance with splices or mechanical splices are permitted in accordance
the approved construction documents. with the provisions of this section. All welding shall conform
to AWS D1.4. Welded splices shall be of ASTM A706 steel
The quality assurance program shall comply with the reinforcement. Reinforcement larger than No. 9 (M #29) shall
inspection and testing requirements of Chapter 17 and TMS be spliced using mechanical connections in accordance with
602/ACI 530.1/ASCE 6. Section 8.1.6.7.3.
2107.4 TMS 402/ACI 530/ASCE 5, Section 8.3.6, maxi-
mum bar size. Add the following to Chapter 8:
8.3.6 – Maximum bar size. The bar diameter shall not
exceed one-eighth of the nominal wall thickness and shall not
exceed one-quarter of the least dimension of the cell, course
or collar joint in which it is placed.
SECTION 2106 SECTION 2108
SEISMIC DESIGN STRENGTH DESIGN OF MASONRY
2106.1 Seismic design requirements for masonry. Masonry
structures and components shall comply with the require- 2108.1 General. The design of masonry structures using
ments in Chapter 7 of TMS 402/ACI 530/ASCE 5 depending strength design shall comply with Section 2106 and the
on the structure’s seismic design category. requirements of Chapters 1 through 7 and Chapter 9 of TMS
402/ACI 530/ASCE 5, except as modified by Sections 2108.2
SECTION 2107 through 2108.3.
ALLOWABLE STRESS DESIGN
2107.1 General. The design of masonry structures using Exception: AAC masonry shall comply with the require-
allowable stress design shall comply with Section 2106 and ments of Chapters 1 through 7 and Chapter 11 of TMS
402/ACI 530/ASCE 5.
2015 INTERNATIONAL BUILDING CODE® 457
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