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Building components · Frame Members

Shear Wall

Explains the shear wall as a stability element, which is a different duty from carrying vertical load.

Form:Board or sheetRoles:Structure

Educational reference entry. What this element has to do, and whether any particular arrangement of it is adequate, depends on the whole assembly, the loading, the exposure, local requirements, the manufacturer's instructions and qualified professional design.

Overview

What a shear wall is

A shear wall is a wall used deliberately to resist lateral forces — wind, and in some regions seismic action. Because a wall is very stiff in its own plane, it can collect sideways force from the floors and carry it down as a continuous element.

In many buildings the shear walls are grouped as a core, around stairs and lifts, where a wall is required anyway and can run uninterrupted from top to bottom.

Boundaries

How it differs from nearby elements

The distinctions that keep this entry from being a restatement of its neighbours.

  • It is not simply a loadbearing wall. A loadbearing wall carries weight downward; a shear wall's defining duty is resisting sideways force in its own plane, and a wall may do one, the other or both.
  • It is not a racking panel. A racking panel is a sheathed frame element; a shear wall is a wall acting as a stability element in its own right.
  • It is not a partition, even where it looks like one — which is exactly why it is dangerous to treat it as one.

Terminology

Common names and aliases

These names describe the same element. The library keeps one entry per component so that a trade term or a regional name never becomes a second, thinner page.

  • shear walls
  • stability wall
  • core wall

Dependencies

What it depends on

What has to be right elsewhere for this element to do its job.

  • Continuity from the top of the building to the foundations, since a stability element that stops part-way leaves the force with nowhere to go.
  • Its connection to the floors, which is how lateral force gets into it.
  • Openings through it, which reduce what it can resist and have to be accounted for.
  • The foundations beneath, which have to accept forces that are not purely vertical.

Considerations

Topics that genuinely apply here

Subjects worth discussing about this element. These are discussion topics, never measured values, ratings or performance claims.

Structural transfer

A shear wall is a load path for horizontal force, and interrupting it anywhere interrupts the whole path.

Buildability

Stability walls are commonly grouped in cores because that is where an uninterrupted wall can run the full height of a building.

Movement

Lateral stiffness governs how much a structure sways, which is a serviceability matter as well as a safety one.

Fire

Cores frequently combine a stability function with a fire compartmentation function, so an opening cut through affects both.

Materials

Commonly formed from

Material families this element is commonly realised in. This states common practice only — it is not a statement that any of these materials suits this component in a particular building, which depends on the whole assembly and on qualified review.

Materials LibraryReinforced concrete →Cast reinforced concrete walls and cores are the most commonly encountered form.Materials LibraryConcrete block →Reinforced blockwork walls are used as stability elements in lower-rise construction.Materials LibraryCross-laminated timber →Mass timber panels act as stability walls in timber structures.

Assemblies

Building systems this element is met in

The role this component fills inside each assembly. A role describes what the element does there — it is not a statement that this component suits that system in any particular building.

Primary supportLateral Stability →The wall element resisting lateral force and carrying it to the foundations.Primary supportConcrete Frame →Cores and shear walls provide the frame's lateral stability.Primary supportMass Timber Structure →Panels act both to carry vertical load and to stabilise the structure laterally.Primary supportLoad-Bearing Masonry →Walls at right angles to one another provide stability as well as carrying load.Primary supportPrecast Panel Structure →Precast wall panels act as stability elements as well as carrying vertical load.

Where it is met

Application contexts

Building contexts where this element is commonly encountered. Association is not recommendation: appearing here does not mean the component suits every instance of that context, or any particular one.

  • Superstructure

Clarifications

Commonly misunderstood

  • That a wall carrying no floor can be removed. It may be the building's lateral stability, and its removal would not be visible as a sagging floor.
  • That adding openings to a wall only affects it locally. In a shear wall, openings reduce the stability of the whole structure.

Conversations

Questions for qualified professionals

Questions worth asking someone with the project in front of them. This page cannot answer them.

  • Which walls in this structure provide lateral stability?
  • Is the wall continuous from top to bottom, and does anything interrupt it?
  • How is lateral force transferred from the floors into the wall?
  • Do the foundations beneath account for the horizontal forces this wall delivers?

Go deeper

Related Build Design Hub guides

Planning guidance behind the decisions this element involves.

Preparation

Related planning checklists

Owner-side preparation before the conversation where this element comes up.

What this entry does not do

  • No thickness, reinforcement, opening allowance or capacity is stated here.
  • Forming openings in, or removing, a stability wall is major structural alteration requiring qualified design.

Structural Frame Members

The columns, beams, joists, rafters, plates and bracing that make up a load-carrying frame, identified by the position each occupies.

Browse all frame members entries →