Heavy Duty T-15 Ceiling Suspension Grid Systems by DOUGLAS

Professional-grade galvanized steel ceiling grids engineered for maximum flexibility, durability, and efficient installation in commercial and institutional construction projects worldwide.

Ceiling suspension grid (T-15/Heavy Duty)

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Heavy duty

Ceiling suspension grid (T-15)
Ceiling suspension grid (T-15)

DOUGLAS ceiling suspension grids are double web cold-rolled sections, manufactured from hot-dipped galvanized steel, conforms to JIS G3302 SGCC. The tees section is with pre-painted capped. We use only the high quality level galvanized steel also pre-painted galvanized steel supporting with high performance production equipment, to ensure the accurate sizes and locking quality.

The Main Runner is slotted for cross tees at 150mm or 6" centers to give maximum flexibility in the ceiling lay out.

We are holding the 3rd party issued test report which was tested under ASTM C637 to tell its good loading capacity.

Introduction

Our ceiling suspension grids are double web cold-rolled sections, manufactured from hot-dipped galvanized steel, conforms to JIS G3302 SGCC. The tees section is with pre-painted capped. It is given to ensure that the system is manufactured to a very high quality level.

The Main Runner is slotted for cross tees at 150mm or 6" centers to give maximum flexibility in the ceiling lay out.

Types of combination

1200 x 600mm SIZES
DOUGLAS ceiling suspension grids comprises main runners installed at not more than 1200mm centers, securely fixed by pre-straightened suspension wire. The wire shall not more than 1500mm from the main runner splices, or expansion joints, and the maximum distance from the wire to the perimeter of the ceiling shall not exceed 450mm and otherwise at 1200mm centers.
Also, the main runners splices are to be staggered and not less than 450mm from the perimeter. Spanning between main tees are 1200mm cross tees at 600mm centers.

600 x 600mm SIZES
Same mentioned above, only add: 600mm cross tees spanning between 1200mm cross tees 600 module.

Ceiling suspension grid Ceiling suspension grid

Specification

  • Overlap, color: White

System consists of

G.I. : 0.30mm / height : 38mm

ItemSize in metricSize in imperialG.I. thicknessDimension
Main Runner3.6M (3600mm)12FT (3660mm)0.30mm15x38mm
Cross Tee1.2M (1200mm)4FT (1220mm)0.30mm15x38mm
Cross Tee0.6M (600mm)2FT (610mm)0.30mm15x38mm
Wall Angle3.6M (3600mm)0.40mm14x20mm
Wall Angle3.0M (3000mm)0.40mm14x20mm

G.I. : 0.27mm / height : 38mm

ItemSize in metricSize in imperialG.I. thicknessDimension
Main Runner3.6M (3600mm)12FT (3660mm)0.27mm15x38mm
Cross Tee1.2M (1200mm)4FT (1220mm)0.27mm15x38mm
Cross Tee0.6M (600mm)2FT (610mm)0.27mm15x38mm
Wall Angle3.6M (3600mm)0.40mm14x20mm
Wall Angle3.0M (3000mm)0.40mm14x20mm

Advantages

  • It is economical, easy to install, using less labor to complete the installation at minimum time as compared with conventional extruded aluminum tee system.
  • Interchangeability of main and cross tees between systems, promotes lower inventory requirements and greater field flexibility.
  • The straight entry locking feature of the section allows the system to be installed easily within close proximity of the overheads.
  • The system promotes complete designs flexibility and it is capable of sustaining of loads normally designed into suspended tee system (refer to load table)
  • Overlap type of cross tee provide complete flush joint, eliminating gaps between main runner and cross tees and ensure rigidity at fixtures.
  • In line cross tees provide true double-lock action.
Ceiling suspension grid

Fire expansion joint within each length of main runner.
Ceiling suspension grid
Before Fire

Effect after exposure to fire conditions.
Ceiling suspension grid
After Fire

Ceiling suspension grid Assembly System

Installation Steps

  • Step 1: Measuring and planning: Determine the lines for main runners and cross tees in such a way that tiles about the wall are at least half a tile (300mm)
  • Step 2: Mark the desired ceiling height: Measure and mark the walls at all corners above the installation level. Snap a chalk line and test for level.
  • Step 3: Inserting a nail between the wall and the wall angle at marked location serves as a good anchor for this purpose. Check to be sure the cross tee string is at 90°
  • Step 4: Attach the main runners to the hangers
  • Step 5: Install cross tees, assuring that they are adequately connected to main runners
  • Step 6: Lay in panels, beginning at one corner and completing row by row.

Assembly
Each tee grids must be fitted always in the left position (Grey Color) of the slot. Hear the sound "Click"!

Disassembly
Need no tools!
Push, through the left thumb.
Then the tee's edge and simultaneously we pull the tee with our right palm.

Main Runners Disassembly
The disassembly must be done by a screwdriver with a slim tip.

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Best Sale

How can you ensure your suspended ceiling systems meet international building codes while minimizing installation time and labor costs?

DOUGLAS T-15 Heavy Duty ceiling suspension grids are engineered to deliver code-compliant performance with proven ASTM C637 load capacity testing. Our hot-dipped galvanized steel construction and pre-painted capped tees ensure long-term durability, while the 150mm slotted design enables rapid installation with minimal labor. With 30 years of international market experience, DOUGLAS provides the reliability and efficiency your global projects demand. Request technical specifications and load tables to optimize your ceiling system design today.

The DOUGLAS T-15 system combines economical pricing with labor-efficient installation, significantly reducing project timelines compared to conventional extruded aluminum tee systems. With interchangeable main and cross tees between systems, installers benefit from lower inventory requirements and greater field flexibility. The straight entry locking feature enables seamless installation in tight overhead spaces, while the overlap-type cross tees provide complete flush joints that eliminate gaps and ensure system rigidity. Our heavy duty suspension grid delivers complete design flexibility and proven load-bearing performance, backed by 30 years of international market expertise and advanced manufacturing facilities in Tianjin, China. Contact DOUGLAS today to specify premium T-15 ceiling suspension systems for your next project.

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