Indonesian Standard for Seismic Bracing of Cable Trays

Seismic bracing of cable trays in Indonesia is typically guided by ISAT-approved systems distributed locally, designed to meet both international and local code requirements.OverviewIn Indonesia, seismic bracing for cable trays is implemented to protect electrical and communication systems during earthquakes, particularly in high-risk regions. While there is no widely published Indonesian National Standard (SNI) specifically for cable tray seismic bracing, local contractors and engineers often rely on ISAT seismic bracing systems, which are distributed by companies like JakSemi and engineered to comply with both international standards and local building codes . These systems are used in commercial and industrial projects to ensure code compliance and structural safety.Design ConsiderationsSeismic bracing for cable trays generally involves:Lateral (transverse) bracing: Installed perpendicular to the cable tray to resist side-to-side motion.Longitudinal bracing: Installed parallel to the cable tray to resist movement along the tray's length.Rod stiffeners or HSS bracing members: Used to maintain vertical spacing and transfer seismic forces between multiple levels of cable trays .Attachment to structural elements: Braces are anchored to floors, walls, or roof structures using steel base plates, post-installed anchors, or custom brackets to distribute forces effectively .Reference StandardsIn practice, Indonesian projects often reference international standards for seismic bracing, including:International Building Code (IBC)ASCE 7 (American Society of Civil Engineers)NFPA 13 (National Fire Protection Association)EPRI SQUG Raceway Evaluation Guidelines for cable tray seismic performance These standards provide guidance on calculating seismic forces, spacing of braces, and acceptable performance criteria for non-structural components like cable trays.Local ImplementationJakSemi, as an authorized distributor of ISAT seismic bracing in Indonesia, provides:Engineering and design support for seismic bracing systemsProducts suitable for commercial and industrial installationsAssistance in achieving code compliance in a cost-effective manner Contractors and engineers typically integrate these systems into building designs, ensuring that cable trays remain functional and secure during seismic events.ConclusionWhile Indonesia may not have a dedicated SNI for cable tray seismic bracing, ISAT-approved systems distributed locally are widely used to meet both local and international seismic requirements. Engineers should follow best practices for lateral and longitudinal bracing, use appropriate structural attachments, and reference international standards such as IBC, ASCE 7, and NFPA 13 to ensure safety and compliance.