Concrete spacer PCA-20/25F

2. OVERVIEW – WHAT IS THE 20–25MM BEAM AND SLAB CONCRETE SPACER PCA-20/25F?

The 20–25mm beam and slab concrete spacer PCA-20/25F is a concrete accessory used to support and position the bottom rebar layer of beams and slabs. The product provides dual cover depths of 20mm and 25mm in a single piece, allowing construction crews to select the correct orientation according to drawings and maintain required clearance between rebar and formwork during installation, site traffic, and concrete pouring. A distinct feature of PCA-20/25F is providing an intermediate cover height for beams and slabs, suitable when structural drawings require a larger protective cover than the 15–20mm series. Monolithically cast, the product features a stable contact base for the working surface and a recessed groove to cradle rebar bars. The actual cover orientation must be verified against individual structural element design documents before use.

3. KEY FEATURES AND STRUCTURE

A highlight of PCA-20/25F lies in its stable base structure combined with a recessed rebar support groove. This profile is suited for bottom-layer reinforcement: the base transfers loads down to the formwork, while the top groove holds the rebar firmly in the selected position and helps prevent lateral slipping. The product integrates dual 20mm and 25mm heights. By changing its placement orientation, construction crews can select the appropriate cover height for each area while using the same product code. Specifically, PCA-20/25F provides an intermediate cover height for beams and slabs, suitable when drawings require a larger protective cover than the 15–20mm series. The spacer body is monolithically cast from concrete to work seamlessly with structural concrete. Block surfaces and edges must remain intact; the base must make firm contact with formwork, and the groove must securely fit the rebar position. This product is suitable for bottom-layer reinforcement in beams and slabs and cannot substitute H-shaped spacers or circular bored pile spacers.

4. USER GUIDE

1. Check technical drawings to determine the required orientation/cover height between 20mm and 25mm. 2. Discard cracked, broken, or chipped spacers that compromise the base or support groove. 3. Place in the correct orientation so the base makes stable contact with formwork and the recessed groove securely supports the rebar. 4. Distribute spacers relatively evenly beneath the steel frame; verify that mesh does not sag, tilt, or shift prior to concrete placement. Placement density depends on rebar diameter, mesh spacing, frame rigidity, construction loads, and element geometry. Increase spacer quantity at edges, corners, around openings, rebar lap splices, or areas prone to mesh sagging per technical guidelines.

5. TESTING AND QUALITY CONTROL

The 20–25mm beam and slab concrete spacer PCA-20/25F undergoes quality control per production batch, covering appearance, dimensions, working height, rebar support surface, packaging specifications, and sample load capacity. Prior to usage, clients should verify product codes on packaging, quantity, crack/damage status, and working dimensions against project requirements. Each factory-shipped batch includes a Product Sample Inspection Certificate, detailing product code, batch code, sampling date, test parameters, results, and quality conclusions. The inspection certificate serves to cross-reference received shipments and is retained in material quality management records.