T-Grid Suspension Systems (T-24 & T-15)

The T-Grid is one of the most widely used frameworks for suspended ceilings. Jawdah supplies it with the required suspension accessories so that a contractor receives main tees, cross tees, wall angles, hangers, adjustment clips and anchor bolts as one matched package.

Inverted T-shaped main runners hang from the soffit, cross tees lock between them, and both meet perimeter wall angles, forming open modules in which the tiles simply rest. Because each tile lifts out by hand, the ceiling void stays accessible for maintenance of lighting, air distribution and other services.

An exposed grid does two jobs at once. Structurally, it spans between hangers and carries the tiles, light fittings and air terminals set into the ceiling. Visually, its flange forms the lines that divide the ceiling into modules, so the grid is part of the interior design rather than a hidden component.

The Jawdah T-Grid is aimed at commercial, industrial and interior finishing projects where a practical, accessible ceiling is needed. It is offered in two profiles, two thickness levels, metric and imperial sizes and a choice of cap finishes, and it is the recorded suspension for Jawdah lay-in metal tiles and aluminium open-cell lay-on tiles.

Main tees are the long primary members. They run parallel across the room and hang directly from the hangers. The longer cross tees lock into slots along the main tees at right angles, and the shorter cross tees then divide those bays again. Wall angles fixed around the perimeter receive the ends of both members and carry the edge tiles.

The Jawdah product data notes that the lock design makes the grid module demountable without tools. That matters during service work, when a section of grid sometimes has to be opened to install a new fitting or reach a duct.

The T-24 profile has a 24 mm wide exposed flange and is the standard grid for square-edge lay-in tiles. The T-15 profile has a 15 mm wide exposed flange, giving a narrower sight line and a finer ceiling appearance. Both share the same component logic of main tees, cross tees and perimeter angles.

Thickness is the second choice. The 0.28 mm option is designated Regular and the 0.32 mm option Heavy-Duty; the heavier gauge is the one to discuss when a ceiling carries more fittings or uses heavier tiles. Sizes are available in metric and imperial ranges, and the module most often built with the metric components is 600x600 mm or 600x1200 mm.

Jawdah produces both the grid and many of the tiles it carries, so the T-Grid can be ordered together with lay-in metal tiles, open-cell tiles or gypsum tiles and the accessories that hang them. The data lists maximum economy and design simplicity, corrosion and humidity resistance, and safe, fast and simple installation among its features, and describes the grid as environmentally friendly and recyclable.

Two references are recorded for the Jawdah T-Grid. The core profile material is stated to comply with American ASTM A653M, the standard for hot-dip zinc-coated steel sheet. The fire rating is recorded as Class A1 for the raw material.

Neither reference is a rating for the finished ceiling. A raw-material classification describes how the metal behaves; it does not give the installed ceiling a fire-resistance period. Where a project needs a tested ceiling assembly, that requirement is raised with the Jawdah team as a separate question.

On delivery, check that profile (T-24 or T-15), thickness, cap finish and colour match the order and that caps are free of scratches. After installation, check that main tees are straight and level, that cross tees are fully locked, that wall angles are continuous at corners, and that every hanger is plumb and tight.

A T-Grid needs little maintenance. Caps can be wiped with a soft cloth and a mild, non-abrasive cleaner; avoid scouring pads that would mark the painted face. When tiles are lifted for service work, handle them with clean gloves and return them to the same module so that colour and edge fit stay consistent.

If a section of grid must be opened for new equipment, the demountable lock design lets cross tees be released and refitted without tools. Replace any bent tee rather than straightening it, so that the ceiling line stays true.

Jawdah lists its T-Grid for its metal and gypsum ceiling tiles in auditoriums, cinemas, halls, computer rooms, hospitals, shops, offices, utility rooms, airports, exhibition centres, conference rooms and studios. The same grid also helps organise ceiling layouts around lighting, air-conditioning openings and service access points in schools, commercial buildings and industrial facilities.

An exposed grid is a natural fit wherever services above the ceiling are visited often: data rooms, hospital corridors, retail back-of-house and office floors that are refitted between tenants. In these areas, lifting a tile is quicker and cleaner than opening a sealed ceiling.

The Jawdah data lists the T-Grid as compatible with square-edge (lay-on) ceiling tiles, lay-in ceiling tiles, tegular-edge ceiling tiles and clip-in ceiling tiles. Across the Jawdah range, the grid is recorded as the suspension for Lay-In metal ceiling tiles in aluminium, galvanised steel and stainless steel, for aluminium open-cell lay-on tiles, and for gypsum ceiling tiles and GRG tiles.

Because one grid accepts several tile ranges, a project can mix finishes in one ceiling, for example plain and perforated aluminium tiles alongside gypsum tiles. Where a flush ceiling with no visible grid is wanted, the concealed Clip-In suspension system is the recorded partner for Jawdah clip-in tiles; the clip-in entry in the T-Grid list should be confirmed per project.

Installation starts with a level line around the room. Wall angles are fixed to that line, anchor bolts are set in the soffit, and rod hangers with adjustment clips are dropped to carry the main tees. Main tees are hung and levelled first; cross tees are then clicked into place to complete the module before tiles are laid in.

Set the first main tee so that cut tiles at opposite walls are of similar size. Keep light fittings and diffusers aligned with the module, and provide independent hangers where a fitting's documentation requires it. Jawdah lists an Installation Manual and Tests for the T-Grid, available in hard copy, alongside the T-Grid Suspension System Technical Data Sheet and the Metal Ceiling System Catalogue.

Most grid problems come from incomplete specifications rather than from the product itself.

The specification below is reproduced from the Jawdah product information. Any value not listed here, such as imperial dimensions or a numerical load capacity, is confirmed per project rather than assumed.

The body of each tee is hot-dip galvanised iron stated to comply with ASTM A653M. Galvanising gives the hidden web of the profile its corrosion and humidity resistance, which the Jawdah data lists among the product features.

The visible cap is either pre-painted galvanised iron or aluminium. The pre-painted cap is offered in 9 main standard colours, with other colours upon client request, and an anti-bacterial paint option is available on request for interiors where hygiene is a design priority, such as healthcare areas. Specify the cap colour together with the tile colour so that grid lines read as intended.

Compared with a Clip-In system, the T-Grid shows its framework, but tiles lift out more simply. Compared with strip ceiling carriers, which produce a directional linear ceiling, the T-Grid creates a modular field of tiles. For seamless plasterboard ceilings, drywall framing is used instead, with access provided through dedicated access panels.