SALESFORCE TRANSIT CENTER

Location:
San Francisco, CA
System:
LITEFLAM
Sector:
Transportation
Civic
Commercial
DESIGN GROUP:
Pelli Clarke Pelli
owner:
San Francisco Transit Authority
Contractor:
Crown corr | Webcore
Year:
2018
Download Case study
Walkable fire-rated skylight/floor by Greenlite Glass at SALESFORCE TRANSIT CENTER, San Francisco, CA.

About

SALESFORCE TRANSIT CENTER

Within the Salesforce Transit Center, which is the central hub of San Francisco, space is open, and light filled. Tall, structurally expressive skylights “Light Columns” brings sunshine deep into the building, creating a vibrant and inviting atmosphere. The focal point of STC, and the solution to achieve it, is LITEFLAM XT120 system; a walkable fire-rated skylight specifically developed for this project.

This unitized multi-panel fire-rated glass floor system realized the Architects vision of “light columns” which flood the Grand Hall with natural light. The largest Light Column forms the central element of the 36- meter tall (118- feet tall) Grand Hall, STC’s primary public space. Reaching from the park, down through the bus deck and Grand Hall, and all the way to the train platforms two stories below grade, this dramatic structure will provide light and long views to all areas of the Transit Center.

The specifications put forth by Pelli Clarke Pelli was the most demanding for a fire-rated glass floor/ skylight to date. Some of these include: 2 hrs fire rating, blast-resistant, seismic rating, live loading for foot traffic and waterproofing. It is the perfect expression of form and function.

PROJECT CHALLENGES

Safety, Sustainability, and Seismic Challenges in San Francisco

  • Achieving a 2‑hr fire rating by UL.
  • Engineered to withstand blast loading.
  • Seismic rated for the San Francisco area.
  • Live loading for foot traffic.
  • Sustainability certification (EPD & HPD certified).
  • 10‑year warranty.
Project SOLUTION

LITEFLAM XT120: Advanced Glass for Fire and Seismic Safety

  • Utilized LITEFLAM XT120, a multi‑laminated, fire‑rated glass system with steel supports.
  • Tested and certified by UL to meet the strict ASTM E 119 certification as a life safety product.
  • Laminated structural glass with a sacrificial sheet to reduce long‑term costs.
  • Included main and secondary structural supports with intumescent paint.
  • Applied Low‑E coatings to reduce the building’s energy profile.
PROJECT ACHIEVEMENTS

Largest Fire-Rated Glass Floor in North America

  • Exterior 2‑hr fire rated walkable skylight.
  • Fire‑rated glass floor with a replaceable sacrificial sheet.
  • Largest fire‑rated glass floor in North America (3600+ sq ft).
  • Met all building code and life safety requirements.
  • Passed durability and weather testing by Intertek.
  • Achieved energy code compliance for San Francisco.
STAKEHOLDERS

partners that made the project possible

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testimonial

what people said about the project

“Greenlite Glass Systems was approached by Pelli Clark Pelli (Architect) in 2008 to assist them with their vision of “Light Columns” which bring natural light from the main level down to the grand entrance. Our LITEFLAM fire-rated glass floor system was the only solution at the time, but I knew the project specifications and new challenges were going to be a feat of modern glass technology. Greenlite Glass takes great pride in being a key partner in producing the focal point of is landmark project. I could not have asked for a better project team; we are all very proud of our group accomplishments.”

Ryan Dennet | Founder and President | Greenlite Glass Systems

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