Components | Uniform Building Code References | 1997 Edition

Note: Highlights of referenced sections are noted in parentheses.

SECTION 2101A - GENERAL

2101A.3 Definitions.
GROUTED MASONRY: Grouted Multiwythe Masonry
(space between wythes is solidly grouted)
WALLS: Bonded Wall
(two or more wythes bonded together to act as a structural unit)

SECTION 2102A - MATERIAL STANDARDS

2102A.2 Standards of Quality.
5. Masonry units of concrete.

5.1 UBC Standard 21-3, Concrete Building Brick [or]
5.2 UBC Standard 21-4, Hollow and Solid Load-bearing Concrete Masonry Units

7. Connectors.
7.1 (steel wire conforming to UBC 21-10, Part II)

SECTION 2104A - CONSTRUCTION

2104A.4 Placing Masonry Units.

2104A.4.3 Solid masonry units.
(full head and bed joints)

2104A.6 Grouted Masonry.

2104A.6.1 General Conditions.
(elements act together structurally; grouting considerations)

2104A.6.1.1 Reinforced grouted masonry.

2104A.6.1.1.1 General
(form of construction made with solid concrete building brick; interior joints solid grouted)

2104A.6.1.1.3 High-lift grouted construction
(method subject to approval of enforcement agency)
1. (full head and bed joints)
2. (two tiers bonded with wall ties; minimum wire sizes; wire spacing)
3. (cleanouts at every other unit in bottom tier of section being poured, or by cleanout openings in the foundation)
4. (grout space a minimum of 3 1/2 inches; all reinforcing and wire ties embedded in grout)
5. (vertical grout barriers, no more than 30 feet apart)
6. (approved admixture to reduce early water loss, produce expansive action)
7. (grout in continuous pour; lifts not exceeding 4 feet; consolidated and reconsolidated; sections between barriers completed in one day; special inspection requirements)
8. (stresses not to exceed those in Sections 2107A.2.5 through 2107A.2.11)

SECTION 2106A - GENERAL DESIGN REQUIREMENTS

2106A.1.5 Multiwythe walls.

2106A.1.5.1 General.
(wythes bonded by grout)

2106A.1.5.3 Wall ties for grouted multiwythe construction.
(two wythes bonded together with at least one 3/16 inch diameter wall tie for each 2 square feet of wall area)

2106A.1.12 Special provisions in areas of seismic risk.

2106A.1.12.4 Special provisions for Seismic Zones 3 and 4.

2. Shear Walls

2.2 Bond.
(multiwythe grouted masonry shear walls designed considering adhesion bond strength between grout and masonry units)

2106A.2 Working Stress Design and Strength Design Requirements for...Reinforced Masonry.

2106A.2.2 Specified compressive strength of masonry.
(based on the value of f'm; verified in accordance with Section 2105.3, based on 28-day unless otherwise specified)

2106A.2.3 Effective thickness.

2106A.2.3.2 Multiwythe walls.
(effective thickness is specified thickness when space between wythes is filled with grout)

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