Direct answer: The main types of sway braces for MEP systems are typically cables (or cable-based) sway braces and rigid (often steel) sway braces. Each type serves different movement and load requirements, and many installations use a combination of both to address horizontal seismic forces and thermal movement.
Details
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Cable sway braces
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Primary element: high-tensile steel cable (sometimes with a secondary tension member) that resists horizontal seismic movement.
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Characteristics: generally provide tension resistance, can tolerate some angular movement, and are well-suited for reducing sway without imposing large vertical reactions.
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Applications: commonly used with sprinkler systems and other nonstructural piping where tension-only behavior is acceptable.
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Rigid sway braces
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Primary element: solid members such as steel pipe, angles, channels, or struts (often in combinations with fittings) that resist both tension and compression.
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Characteristics: offer higher stiffness and can transfer vertical reactions, making them capable of controlling sway in multiple directions and accommodating larger loads.
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Applications: used where greater restraint is needed, where both horizontal and vertical components of seismic loads must be managed, or where listing/warranty requires rigid connections.
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Hybrid and multi-directional braces
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Often includes combinations of rigid members with flexible connectors or cable elements to tailor performance to specific equipment and support configurations.
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Purpose: balance movement control, allow for thermal growth, and meet code-based restraint requirements.
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Attachments and fittings (supporting components)
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Include structural attachments, bracing brackets, swivels or hinges, clamps, and anchor hardware that connect braces to supports and the equipment being restrained.
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Role: enable proper alignment, transfer loads, and accommodate installation tolerances.
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Selection considerations
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Seismic requirements and codes: NFPA 13 (for sprinkler systems) and ASCE 7-16/7-22 provide guidance on when and how to use sway braces, including tension-only versus dual-direction resistance.
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Load paths and deflection limits: ensure brace type, spacing, and connection details meet the design’s allowable deflections and load transfer needs.
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System movement: consider whether the primary movement is lateral, vertical, or a combination, which influences choosing cables versus rigid members.
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Environmental and compatibility: corrosion protection, finishes, and compatibility with the supported equipment and existing support structures.
If you’d like, specify the exact system (e.g., sprinkler piping per NFPA 13, HVAC ducting, or general mechanical/electrical equipment), the governing codes, and any constraints (space, load, or inspection requirements). A tailored list of typical brace types, recommended configurations, and example component names can be provided.
For more details on installation and specifications, visit our official product page or contact our technical support team for personalized assistance.
