One of the many intrinsic characteristics of concrete masonry construction is its ability to resist large axial loads with or without concurrently applied in-plane or out-of-plane loads. This Checklist covers the general and prescriptive design and detailing requirements for unreinforced, single wythe loadbearing masonry walls subjected to axial or out-of-plane loads. While unreinforced wall systems may contain reinforcing steel, the presence of any reinforcement is not taken into consideration when determining the strength of these assemblies. For information covering the design of reinforced loadbearing concrete masonry walls see: • DC-9-22, Designer Checklist for Reinforced Loadbearing Concrete Masonry Walls The following Checklists review additional information related to the design and detailing of concrete masonry shear walls systems: • DC-4-22, Designer Checklist for Ordinary Reinforced Concrete Masonry Shear Walls • DC-5-22, Designer Checklist for Ordinary Reinforced Concrete Masonry Shear Walls • DC-6-22, Designer Checklist for Intermediate Reinforced Concrete Masonry Shear Walls • DC-7-22, Designer Checklist for Special Reinforced Concrete Masonry Shear Walls TMS 402 contains design modeling options for both allowable stress design (ASD) and strength design (SD). Where design checks differ between these two modeling approaches, they are addressed separately in this Checklist. CHECK REQUIREMENT REFERENCE DESIGNER NOTE

The lateral force-resisting system of most masonry structures is typically provided by masonry shear walls. This Checklist specifically covers the general and prescriptive design and detailing requirements for ordinary plain and detailed plain unreinforced masonry shear walls. While these shear wall systems may contain reinforcing steel, the presence of any reinforcement is not taken into consideration when determining the strength of these assemblies. Ordinary plain and detailed plain unreinforced concrete masonry shear walls are permitted to be used as part of the lateral force-resisting system in structures assigned to Seismic Design Category (SDC) A and B as well as for all wind speed zones, provided design loads can be safely resisted discounting the presence of any reinforcement. Ordinary plain unreinforced masonry shear walls require no minimum prescriptive seismic reinforcing while detailed plain unreinforced masonry shear walls are prescriptively reinforced in the vertical direction with conventional mild reinforcement and in the horizontal direction using reinforced bond beams or joint reinforcement. Bond beams are horizontal, sloped, or stepped structural elements within masonry walls used to distribute lateral and gravity loads, provide continuity, and resist bending, shear, and torsional forces. They are particularly critical at floor and roof levels and at the tops of walls. Bond beams may also coincide with the top of openings, in which case they may also provide the dual function of a lintel. See separate Checklist DC-2-22, Designer Checklist for Concrete Masonry Lintels, for information specific to masonry lintels (beams) over openings. Additional Checklists related to the design and detailing of concrete masonry shear walls systems include: • DC-5-22, Designer Checklist for Ordinary Reinforced Concrete Masonry Shear Walls • DC-6-22, Designer Checklist for Intermediate Reinforced Concrete Masonry Shear Walls • DC-7-22, Designer Checklist for Special Reinforced Concrete Masonry Shear Walls TMS 402 contains design modeling options for both allowable stress design (ASD) and strength design (SD). Where design checks differ between these two modeling approaches, they are addressed separately in this Checklist.

The lateral force-resisting system of most masonry structures is typically provided by masonry shear walls. This Checklist specifically covers the general and prescriptive design and detailing requirements for special reinforced masonry shear walls. Special reinforced concrete masonry shear walls are permitted to be used as part of the lateral force-resisting system in structures assigned to any Seismic Design Category (SDC) as well as for all wind speed zones. Special reinforced masonry shear walls are reinforced in the vertical direction with conventional mild reinforcement and in the horizontal direction typically using reinforced bond beams. Bond beams are horizontal, sloped, or stepped structural elements within masonry walls used to distribute lateral and gravity loads, provide continuity, and resist bending, shear, and torsional forces. They are particularly critical at floor and roof levels and at the tops of walls. Bond beams may also coincide with the top of openings, in which case they may also provide the dual function of a lintel. See separate Checklist DC-2-22, Designer Checklist for Concrete Masonry Lintels, for information specific to masonry lintels (beams) over openings. Additional Checklists related to the design and detailing of concrete masonry shear walls systems include: • DC-4-22, Designer Checklist for Detailed Plain Concrete Masonry Shear Walls • DC-5-22, Designer Checklist for Special Reinforced Concrete Masonry Shear Walls • DC-6-22, Designer Checklist for Intermediate Reinforced Concrete Masonry Shear Walls TMS 402 contains design modeling options for both allowable stress design (ASD) and strength design (SD). Where design checks differ between these two modeling approaches, they are addressed separately in this Checklist.

The lateral force-resisting system of most masonry structures is typically provided by masonry shear walls. This Checklist specifically covers the general and prescriptive design and detailing requirements for intermediate reinforced masonry shear walls. Intermediate reinforced concrete masonry shear walls are permitted to be used as part of the lateral force-resisting system in structures assigned to Seismic Design Category (SDC) A, B, and C as well as for all wind speed zones. Intermediate reinforced masonry shear walls are reinforced in the vertical direction with conventional mild reinforcement and in the horizontal direction using reinforced bond beams or joint reinforcement. Bond beams are horizontal, sloped, or stepped structural elements within masonry walls used to distribute lateral and gravity loads, provide continuity, and resist bending, shear, and torsional forces. They are particularly critical at floor and roof levels and at the tops of walls. Bond beams may also coincide with the top of openings, in which case they may also provide the dual function of a lintel. See separate Checklist DC-2-22, Designer Checklist for Concrete Masonry Lintels, for information specific to masonry lintels (beams) over openings. Additional Checklists related to the design and detailing of concrete masonry shear walls systems include: • DC-4-22, Designer Checklist for Detailed Plain Concrete Masonry Shear Walls • DC-5-22, Designer Checklist for Ordinary Reinforced Concrete Masonry Shear Walls • DC-7-22, Designer Checklist for Special Reinforced Concrete Masonry Shear Walls TMS 402 contains design modeling options for both allowable stress design (ASD) and strength design (SD). Where design checks differ between these two modeling approaches, they are addressed separately in this Checklist.

The lateral force-resisting system of most masonry structures is typically provided by masonry shear walls. This Checklist specifically covers the general and prescriptive design and detailing requirements for ordinary reinforced masonry shear walls. Ordinary reinforced concrete masonry shear walls are permitted to be used as part of the lateral force-resisting system in structures assigned to Seismic Design Category (SDC) A, B, and C as well as for all wind speed zones. Ordinary reinforced masonry shear walls are reinforced in the vertical direction with conventional mild reinforcement and in the horizontal direction using reinforced bond beams or joint reinforcement. Bond beams are horizontal, sloped, or stepped structural elements within masonry walls used to distribute lateral and gravity loads, provide continuity, and resist bending, shear, and torsional forces. They are particularly critical at floor and roof levels and at the tops of walls. Bond beams may also coincide with the top of openings, in which case they may also provide the dual function of a lintel. See separate Checklist DC-2-22, Designer Checklist for Concrete Masonry Lintels, for information specific to masonry lintels (beams) over openings. Additional Checklists related to the design and detailing of concrete masonry shear walls systems include: • DC-4-22, Designer Checklist for Detailed Plain Concrete Masonry Shear Walls • DC-6-22, Designer Checklist for Intermediate Reinforced Concrete Masonry Shear Walls • DC-7-22, Designer Checklist for Special Reinforced Concrete Masonry Shear Walls TMS 402 contains design modeling options for both allowable stress design (ASD) and strength design (SD). Where design checks differ between these two modeling approaches, they are addressed separately in this Checklist.

Concrete masonry lintels (the term beam is used interchangeably with lintel) are horizontal elements spanning openings in masonry walls (doors, windows, etc.). They are required to safely transfer loads from above to the wall areas adjacent to the opening. Lintels are subject to combined flexural and shear stresses and must be detailed to control cracking, deflection, and ensure durability. See separate Checklist DC-3-22, Designer Checklist for Concrete Masonry Bond Beams, for design and detailing requirements for masonry beams built into the field of the masonry assembly. TMS 402 contains design modeling options for both allowable stress design (ASD) and strength design (SD). Where design checks differ between these two modeling approaches, they are addressed separately in this Checklist.

Concrete masonry partition walls are interior walls without structural function commonly used for space separation, fire resistance, and sound insulation. While partitions do not carry vertical loads other than their own weight, they are subject to lateral loading due to HVAC pressurization, occupants, seismic loads, and internal pressures from external wind entering into the structure through openings or small leakage paths. This checklist is applicable to concrete masonry partitions based on TMS 402/602-22. TMS 402 contains design modeling options for both allowable stress design (ASD) and strength design (SD). Where design checks differ between these two modeling approaches, they are addressed separately in this Checklist.