A smiling man wearing an orange welding jacket and gloves, welding metal with sparks flying, and a welding helmet on his head.
LYS (Lai Yew Seng) -Perspective view of a modern building's steel framework, with a sharp triangular roof structure against a black and white background.

Structural Steel Experts.
Custom Solutions, Built to Last.

Shaping Singapore’s skyline with
precision-engineered steel structures since 1956.

LYS (Lai Yew Seng) is a trusted specialist in structural steel engineering, offering full-spectrum services across design, fabrication, and installation. We build to specification with the capability to handle intricate geometries, heavy-load structures, and tailored steel assemblies for diverse applications. From BIM-coordinated planning to on-site erection, our processes are backed by stringent QA/QC standards and deep industry expertise.

Trusted by Engineers — Learn Why

Engineering Tomorrow’s Landmarks in Steel.

  • Customised Steel Works Solutions

    Tailor-Made Steel Assemblies for Unique Architectural and Functional Requirements

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  • Structural Steel Solutions

    Engineered Load-Bearing Frameworks for Complex Builds

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  • HVM Solutions (Hostile Vehicle Mitigation)

    Certified Security Bollards and Barriers for Critical Infrastructure Protection

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Our Steel Expertise

LYS (Lai Yew Seng) -Interior view looking up at a glass and steel dome structure with a circular opening at the top, featuring geometric patterns and metal framework.

Structural Steel Solutions

Engineered Load-Bearing Frameworks for Complex Builds

We design, fabricate, and install structural steel systems that form the core of commercial, industrial, and civic developments. With proven capabilities in handling high-load, large-span, and geometrically complex structures, our solutions comply with local codes and international standards for safety, stability, and long-term performance.

View Structural Expertise
A row of metallic, cylindrical bollards along a paved sidewalk, with green grass and colorful flower bushes in the background.

HVM Solutions
(Hostile Vehicle Mitigation)

Certified Security Bollards and Barriers for Critical Infrastructure Protection

LYS supplies and installs PAS 68 / IWA 14-compliant bollards and perimeter defence systems designed to mitigate high-impact vehicle threats. Our solutions are engineered for government facilities, airports, embassies, and public spaces requiring enhanced protection without compromising urban aesthetics.

Discover HVM Capabilities
Large metallic rocket prototype on a construction platform with a blue sky background.

Customised Steel Works Solutions

Tailor-Made Steel Assemblies for Unique Architectural and Functional Requirements

From bespoke architectural features to specialised infrastructure elements, we offer end-to-end custom steel fabrication. Our engineering team works closely with consultants and main contractors to translate technical drawings into precise, shop-ready outputs, ensuring seamless integration with the broader construction scope.

Explore Custom Solutions
Logo with a stylized red hand and black text, featuring the words "BGA" and "SMC."
Certification logo indicating IAS accreditation for management systems, including a shield with 'LMS' initials, a laurel wreath, and the text 'Certified ISO 9001:2015'.
Certification logo for LMS with IAS accreditation for management systems, ISO 45001:2018
Logo of the Singapore Structural Steel Society with a stylized steel beam graphic and the text 'Singapore Structural Steel Society' and 'Certificate No: ASSF-004'.
Logo with the word safety in gray with a green plus sign, the words kids in red cursive and star in gray and red. The design includes a red check mark crossing the word kids and a red star shape. Grass is illustrated growing from the letter 'A' in safety.

Built on Engineering.
Driven by Precision.

LYS (Lai Yew Seng) has been a trusted partner in structural steel solutions since 1956, delivering engineering-grade steelwork for Singapore’s evolving infrastructure landscape. Our operations are grounded in technical rigour, fabrication expertise, and compliance with stringent safety and quality standards. With an experienced team and ISO-certified processes, we support complex builds across sectors, from commercial to public infrastructure, with reliability and results that stand the test of time.

Learn More About LYS
A worker in safety gear welding metal in an industrial workshop.

Contact Us

Discuss Your Steel Requirements with Our Technical Team

Looking to collaborate on your next structural or custom steel project? Submit your enquiry and our engineering or project coordination team will respond promptly to discuss specifications, timelines, or technical requirements.