MSS SP-127

Covers — (historical, now in SP-58) bracing components and application for restraining piping against seismic and lateral sway loads: braces, connectors, and attachment methods.

Does NOT cover / superseded by — current guidance lives elsewhere:

• Current consolidated support/bracing standard → MSS SP-58 (2018) (successor).
• Seismic design forces and demand → the building/seismic code (ASCE 7 / IBC).
• Gravity support components and spacing → SP-58 support Types.

SP-127 bracing content is now in SP-58; the seismic demand still comes from the building code.

SP-127 provided bracing guidance (now within SP-58):

• Bracing Components — braces and connectors for lateral/longitudinal restraint.
• Application — how to apply sway and seismic bracing to piping runs and branches.
• Coordination — bracing works with (not instead of) gravity supports; demand comes from the seismic code.
• Current Basis — consolidated into MSS SP-58 (2018).

MSS SP-127 addressed bracing for piping systems — the components and application methods that restrain pipe against seismic and lateral sway loads. It has been consolidated into MSS SP-58 (2018).

SP-127 covers the bracing hardware and how to apply it, but the seismic design demand — the forces the bracing must resist — comes from the building/seismic code such as ASCE 7. Bracing complements gravity supports rather than replacing them; both are often required on the same line.

Engineering Note: Keep seismic bracing and gravity support separate in the design — a gravity hanger is not a seismic brace, and adding bracing without the ASCE 7 demand analysis can under- or over-restrain the pipe.