Skip to content
Call to order Products Cart
CROSSLOCK reinforcement positioning systems

Keep reinforcement in the right position before concreting.

Self-locking cover blocks, rebar chairs and vertical rebar spacers for slabs, beams, columns, footings, top steel and pile cages.

Choose by RCC work Why CROSSLOCK
Self-lockingDesigned to stay with the steel
Application basedStart from the RCC work
Product + quantityOne calculator helps with both
CROSSLOCK self-locking cover block
CROSSLOCK rebar chair supporting top reinforcement
CROSSLOCK vertical rebar spacers
CROSSLOCK PS-50 pile cage spacer wheel
CROSSLOCK CL-20 self-locking cover block
Concrete cover

Self-Locking Cover Blocks

For reinforcement that has to remain at the required concrete cover. CROSSLOCK cover blocks positively engage with the steel, helping the spacer stay in position during normal site handling before concreting.

Best for
SlabBeamColumnFooting / Raft
Choose based on

Required concrete cover, reinforcement size / arrangement and the RCC member being constructed.

Products in this line
CL-15CL-20CL-25CL-30CL-40CL-50CL-60CL-75CL-100CLB-25CLB-3032CLB-40
Why this line: Positive fixing to reinforcement helps reduce unwanted movement or rotation compared with a loosely placed spacer.
Understand this line View products / buy
CROSSLOCK rebar chair supporting top reinforcement
Top reinforcement

Rebar Chairs

For supporting top reinforcement at the required level in slabs. Rebar chairs are different from cover blocks: their job is to support the upper steel layer where the structural drawing requires it.

Best for
Top steelNegative steelCantilever steelDouble reinforcement
Choose based on

Required support height and the arrangement of the upper reinforcement at the location being supported.

Products in this line
CL-75CL-100
Why this line: Keeping top steel at the intended level helps preserve the reinforcement position and effective depth assumed in the structural design.
Understand this line View products / buy
CROSSLOCK Spiderlock vertical rebar spacers
Side & radial cover

Vertical Rebar Spacers

For reinforcement that needs side or radial cover in columns, walls, beam sides and pile cages. Different CROSSLOCK designs are used because these applications do not all have the same fixing or movement conditions.

Best for
ColumnWallBeam sidePile cage
Choose based on

Required side / radial cover, reinforcement arrangement and whether the cage works against shuttering or a pile-bore surface.

Products in this line
CLB-40SL-2540SL-40PS-50
Why this line: CLB-40, Spiderlock and the separate PS-50 pile-cage wheel solve different vertical or radial positioning conditions instead of treating every job as the same.
Understand this line View products / buy
Start from the work being done now

Which RCC work are you doing now?

A house, school or multi-storey building can need the same RCC applications. Choose the work at site now; then check cover, support height and steel arrangement.

01FoundationFooting · raft · pile
02Starter & plinthColumn starter · plinth beam · RCC DPC
03Vertical workColumn · RCC wall · stair
04Beam & slabBottom steel · beam · conduit · top steel
05Repeat floorFollow the structural drawing

This is a common site sequence. The actual order can change with the structural drawing and construction method.

01 Foundation work

Footing / Raft

Choose for foundation type, specified cover, mat size and column zones.

Choose foundation product → 02 Pile foundation

Pile Cage

Maintain radial cover while the reinforcement cage is lowered into the pile bore.

Choose pile spacer → 03 RCC column

Column

Maintain side cover and keep the reinforcement cage away from shuttering before concreting.

Choose column product → 04 RCC wall

Wall / Retaining Wall

Maintain side cover on both faces before shuttering and concrete placement.

Choose wall product → 05 RCC beam

Beam

Check the required cover and largest main-bar diameter before choosing the beam cover block.

Choose beam product → 06 RCC slab

Slab Bottom Steel

Choose the cover block from the cover specified in the structural drawing.

Choose slab product → 07 Upper reinforcement

Top Steel

Use rebar chairs to keep the upper steel layer at the required level.

Choose rebar chair → 08 Services in concrete

Electrical Conduits

Support conduits at the intended level and maintain the required separation before concreting.

Choose conduit support →
See all applications
Why CROSSLOCK

A spacer should stay with the steel, not become a loose piece on site.

Walking on reinforcement, lowering cages, shuttering, concrete placement and vibration can disturb loose supports. CROSSLOCK products are designed around positive fixing, stable positioning and practical installation.

01

Retained with reinforcement

Products grip or lock with the steel instead of depending only on loose placement.

02

Helps stay in position

The product geometry is designed to resist unwanted movement or rotation during normal site handling.

03

Concrete-friendly geometry

Open profiles are used where needed so concrete can pass through and around the spacer.

04

Right product for the right position

Cover blocks, chairs and vertical spacers solve different reinforcement-positioning problems.

Compare the complete site cost

Do not compare only the price of one cover block.

Compare the material actually used, labour, breakage, movement and whether the specified steel position is maintained. Never reduce cover specified by the structural engineer.

01

Extra concrete has a cost

If extra slab thickness is added only as a site allowance for expected cover loss, calculate that concrete separately.

0.46 m³Approx. extra concrete₹1,951
02

Compare with the traditional steel piece

A 12-inch piece of 25 mm steel is sometimes used below down-beam reinforcement. Compare its cost with two beam cover-block pieces for the same support point.

12-inch, 25 mm steel pieceabout ₹79Approx. 1.18 kg
Two CLB-25 pieces ₹40 At ₹2,000 MRP / 100-piece packet
03

Then compare site performance

  • Does the spacer lock with the reinforcement?
  • Can it move or break before concreting?
  • Does it hold the required cover or support height?
  • What labour, wastage or rework can be avoided?
Choose product + calculate quantity

Planning example only. Enter your local concrete and steel rates. Product selection, quantities and prices should be checked for the actual project; structural drawings, project specifications and site conditions take priority.

Choose product + estimate quantity

Tell us the application. The calculator will guide the product choice and requirement.

Start with the work being done. The calculator asks only the inputs needed for that application, identifies the suitable CROSSLOCK option and gives an approximate site quantity.

CROSSLOCK

Choose Product + Calculate Quantity

What is present in your slab?

Untick anything not applicable

Leave total beam length blank to use the quick estimate.

Down-beam main bar: select the largest diameter
Bottom steel: 20 mm cover · 2 ft spacing
Before choosing a spacer

Why reinforcement position matters.

The structural drawing fixes where the reinforcement has to remain. Different CROSSLOCK products support bottom cover, top-steel level and side cover in different RCC conditions.

01

Concrete cover

Cover blocks help keep steel at the specified distance from the concrete face or shuttering.

02

Top steel level

Rebar chairs support upper reinforcement where its level has to be maintained before concreting.

03

Side cover

Vertical spacers help keep column, beam, wall and pile reinforcement away from shuttering or the pile-bore face.

04

Different jobs need different products

Selection starts from the application, required cover or support height and reinforcement arrangement—not from one universal spacer.

Self-Locking Cover Blocks → Rebar Chairs → Vertical Rebar Spacers →
Questions people ask on site

Get the answer before you decide.

These are common questions before product selection, installation and purchase. Detailed technical explanations are available on the relevant product-line pages.

Why not use a cement or mortar cover block?

Compare more than the piece price. Look at strength, consistency, fixing, movement during site work, breakage or wastage and whether the required concrete cover is actually maintained.

Why can CROSSLOCK cost more than a traditional cover block?

Piece price is only one part of the decision. The useful comparison also includes fixing, site handling, movement, breakage or wastage, consistency and possible rework.

Will the spacer move during concreting?

CROSSLOCK products are designed to remain engaged with reinforcement and resist unwanted movement or rotation. Correct product selection and installation still matter.

Why use a rebar chair for top steel?

A rebar chair supports the upper reinforcement at the required level. It is a different job from maintaining bottom concrete cover, so a cover block should not be treated as a chair.

Why use a vertical rebar spacer?

Columns, beams, walls and pile cages need side or radial cover. A vertical spacer stays with the cage while reinforcement is handled, shuttering is closed or a pile cage is lowered.

Which CROSSLOCK should I use?

Start with the RCC work being done now. Then check the required cover or support height, bar diameter and reinforcement arrangement. Use the combined product selector and quantity calculator above.

CROSSLOCK products

See the products, specifications and buying options.

Browse the products and check the application first. Online payment is temporarily unavailable; call CROSSLOCK to confirm the product, quantity and order details.

See all products
Need more information?

Understand the application and product before you buy.

CoverSelf-Locking Cover Blocks — concrete cover, fixing and performance→ Top steelRebar Chairs — top reinforcement support and selection→ VerticalVertical Rebar Spacers — columns, walls, beams and pile cages→ UseWhere CROSSLOCK is used in RCC construction→ LearnSite questions, installation guides and technical articles→
Still not sure?

Tell us what you are constructing and where the reinforcement needs support.

Call to order View products Project enquiry → WhatsApp →
Chat with us