Solid Bottom Cable Tray: Sizes, Thickness & Specifications

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A solid bottom cable tray is a cable tray with a continuous, unperforated base and two side walls. It supports cables along their full length and keeps dust, dripping liquid and falling debris off them. Aparna Rollform roll-forms solid bottom type cable trays from GI sheet or aluminium, in widths of 50–300 mm, with matching covers and fittings.

What Is a Solid Bottom Cable Tray?

A solid bottom cable tray is a channel-shaped length of sheet metal: a flat, unbroken base with a side wall along each edge. Cables lie directly on the base, so they are supported continuously rather than at intervals, as they are on the rungs of a ladder tray.

The same product is also sold as a closed-type cable tray, a solid cable tray or a solid bottom trough.

In a cable management system, the solid bottom tray is one of four cable tray types Aparna Rollform manufactures, alongside perforated, ladder and angular ladder trays. Choose it when protecting the cables matters more than ventilating them.

Features and Benefits

Feature	What it does	Why it matters on site
Continuous, unperforated base	Supports cables along their whole length	Cables do not sag between supports. This suits fibre-optic and small data cables that point supports can strain.
Closed underside	Stops dust, dripping liquid and debris from passing through the tray	Protects cables routed below process areas, mezzanines and ceiling voids.
Side walls of 25, 38 or 40 mm	Hold the cables within the tray width	Keeps small and medium cable groups contained and neat.
Optional hut, flat or U-type cover	Closes the top of the tray	Shields cables from falling objects, settling dust and accidental contact, and keeps them out of sight.
Matching fittings	Keep the solid profile through bends, tees and crosses	Protection continues past the first change of direction.
GI, HDG, powder-coated or aluminium	Match the finish to the environment	Trays, covers and fittings can share one finish, so coatings match at every joint.

Solid bottom trays can carry power, control, instrumentation and data cables. They suit circuits that produce little heat, as the next section explains.

When to Choose a Solid Bottom Cable Tray?

Where Solid Bottom Trays Work Best?

Data, IT and telecom routes: network and fibre-optic cables that need continuous support and a tidy, closed route.
Instrumentation and control cables: signal cables in industrial plants that benefit from a separate, covered run.
Below or beside process areas: routes under mezzanines, conveyors or equipment where dust, drips or falling material are likely.
Exposed commercial routes: ceiling and wall runs where a closed tray looks neater than an open one.
Branch runs to panels and equipment: short drops from a main tray where cable quantities are small.

Solid Bottom Cable Tray Specifications

Sizes and Dimensions

Parameter	Range
Width (W)	50–300 mm
Height (H)	25, 38 or 40 mm
Thickness (T)	1.6, 2.0 or 3.0 mm
Standard length (L)	2,500 or 3,000 mm
Raw material	GI sheet or aluminium
Finish	Pre-galvanised (GI), hot-dip galvanised (HDG), powder coated or aluminium

How to read a size: width is measured across the base, height is the side wall and thickness is the sheet gauge. A 150 × 38 × 2.0 mm tray is 150 mm wide, has 38 mm side walls and is made from 2.0 mm sheet.

Materials and Finishes

Finish	How it is applied	Typically suited to
Pre-galvanised (GI)	Tray formed from zinc-coated sheet	Indoor, dry areas: commercial buildings, IT rooms, plant interiors
Hot-dip galvanised (HDG)	Finished tray dipped in molten zinc after forming	Outdoor, industrial and higher-corrosion areas
Powder coated	Electrostatic powder applied and oven-cured	Commercial interiors where appearance or colour coding matters
Aluminium	Tray formed from aluminium sheet	Lightweight runs and corrosion-sensitive locations

A pre-galvanised tray is coated before it is cut and formed, so its cut edges rely on the surrounding zinc for protection. Hot-dip galvanising coats the finished tray, including every edge. That is why HDG is the usual choice outdoors.

GSM is the zinc coating mass in grams per square metre. A higher GSM means more zinc and longer protection in a given environment. State the coating your project specifies in your enquiry.

Standards

Aparna Rollform cable trays are manufactured to IEC 61537, the international standard for cable tray and cable ladder systems. Hot-dip galvanising follows IS 2629 and IS 4759, with coating uniformity and mass tested to IS 2633 and IS 6745.

Solid Bottom Cable Tray with Cover

A cover turns a solid bottom tray into a fully closed cable route. The base and side walls protect the cables from below and from the sides. The cover protects the top from falling objects, settling dust, accidental contact and tampering.

Cover types: hut type (pitched top that sheds water and debris), flat type and U type.
Fixing options: self-tapping, clamping or press-type.
Size: the cover width is the tray width plus 4 mm, so it fits over the side walls.
Finish: supplied to match the tray finish.

A steel tray with a steel cover, joined without gaps and bonded to earth, screens cables from external electrical interference better than an open tray. Where EMI screening is a design requirement, it should be specified by the project’s electrical designer. Outdoors, a covered tray can trap condensation, so plan drainage points at the design stage.

Full cover dimensions and types are on the cable tray covers page.

Matching Fittings

Fittings are supplied in the same solid profile, so the route stays closed through turns and junctions.

Fitting	What it does
90° horizontal bend	Turns the route left or right on the same level
90° vertical inside bend and 90° vertical outside bend	Take the route up or down between levels, one bend for each direction of turn
Horizontal tee	Joins three routes in a T-junction
Horizontal cross	Joins four routes at a single point

Bend radius: 150, 300, 450 or 600 mm, or as specified by the customer.
Thickness: 1.6 mm to 3.0 mm.
Finish: galvanised sheet, powder coated or enamel painted.

What to Send for a Quotation?

Send these details with your enquiry for an accurate quotation:

Tray width, height and thickness
Material and finish (GI, HDG, powder coated with colour, or aluminium) and the zinc coating your project specifies
Total run length in metres and the standard length
Cover type (hut, flat or U), if required
Fittings by type and quantity, with the bend radius
Installation environment (indoor, outdoor or corrosive) and the planned support spacing
Delivery location and required date

A cable schedule or routing drawing, if you have one, helps the technical team check tray sizes and fittings.

Manufactured by Aparna Rollform

Aparna Rollform is the roll-forming division, which manufactures cable trays are made on high-speed cold roll-forming mills at the plant in Rudraram, Patancheru, Telangana, which carry out punching, bending and cutting in single-line operations. .

The Rollform division holds ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certification. Solid bottom trays, covers and fittings come from the same plant in the same finish, so profiles and coatings match across the installation. Trays are supplied across India from Hyderabad.

Frequently Asked Questions On Solid Bottom Cable Tray

What is the difference between a solid bottom and a perforated cable tray?

A solid bottom tray has a continuous, unperforated base, while a perforated tray has a slotted base. The solid base gives more protection from dust, drips and debris. The perforated base lets more heat and water escape. Aparna Rollform makes solid bottom trays in widths of 50–300 mm and perforated trays in widths of 50–1,500 mm.

Is a solid bottom cable tray the same as a closed-type or trough cable tray?

Yes. In India, “closed-type cable tray” usually means a solid bottom tray. “Trough” is less precise: some manufacturers use it for both solid and ventilated trays. When comparing quotations, check that the base is specified as unperforated.

Do solid bottom cable trays need a cover?

Not always. The solid base already protects cables from below. Add a cover where the top of the run is exposed to falling objects, dust, contact or tampering, or where cables need to be kept out of sight.

What is the lead time for solid bottom cable trays?

For average order sizes, the standard lead time is about one week for pre-galvanised trays and two weeks for hot-dip galvanised trays. Confirm the lead time for your quantity, cover and fittings when you request a quote.

What determines the price of a solid bottom cable tray?

Price depends on the tray size and thickness, the material and finish, the covers and fittings required, the order quantity and the delivery location. Share these details through the quote form for an accurate price.

Request a Quote

Share your tray size, finish, quantity and delivery location, and Aparna Rollform’s team will respond with a quotation. Call 📞91540 88439 or email info@aparnarollform.com.

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Standard Specifications	Ram materials	Finishes
Solid Bottom Tray width (MM): 50 – 1200	Pre-galvanized (GI) confirming to IS 277	Hot Dip Galvanized (HDG) as per IS 2629, IS 2633, IS 4759 & IS 6745
Solid Bottom Tray Height (MM): 20 – 150	Mild Steel (MS) Confirming to IS .1079, IS 10748, IS 2062 & IS 513	Pre-galvanized GI as per 277 (90 GSM, 120GSM)
Solid Bottom Tray Flange (MM): 15-25	Aluminium (AL) Confirming to IS 737	Powder Coated
Solid Bottom Tray Thickness (MM): 1.6 – 3	Stainless Steel confirming to Grade 304 & 316	Aluminium (AL) Confirming to IS 737
Solid Bottom Tray Length (MM): 2500 - 6000		Stainless Steel confirming to Grade 304 & 316
Tray Thickness (MM): 1.6 – 3
Tray Length (MM): 2500 - 6000