Formwork hub · concrete and scaffolding hardware
Formwork accessories
Formwork accessories are the metal hardware that hold concrete forms, scaffolding, and rebar in position during pouring and curing. Riyadh Timber stocks **shoring jacks, scaffold tubes and clamps, concrete spacers, and construction fixings — load capacities 5 to 40 kN, prices SAR 8 to 450 per piece** — for high-rise, infrastructure, and Vision 2030 sites.
What are formwork accessories?
Formwork accessories are the metal components — shoring jacks, scaffold tubes, clamps, concrete spacers, and fixings — that brace, support, and align concrete forms and scaffolding during construction. Riyadh Timber supplies the full set in galvanised or painted steel, certified to EN 1065, EN 74, BS 1139, and SBC 502.
Formwork accessories carry the temporary loads on a construction site: vertical shoring jacks transfer slab weight, scaffold tubes and clamps build access frames, concrete spacers hold rebar at the correct cover, and nails and screws fix timber forms to bearers.
Each accessory category maps to a defined load class. Shoring jacks support 20 to 35 kN, scaffold clamps slip-resist 9 kN, concrete spacers carry 5 to 8 kN per piece. The site engineer selects each item against the structural drawing and method statement.
Why are formwork accessories essential for concrete construction?
Formwork accessories are essential because fresh concrete exerts up to 80 kN/m² of lateral pressure during pouring. The accessories transfer that pressure into the temporary support structure and ensure rebar cover, form alignment, and worker access remain stable until the concrete cures and the form is stripped.
Without correctly specified jacks and clamps, formwork bows under pour pressure, producing misaligned columns and slab deflection that fails inspection. Without spacers, rebar drifts to the form face, exposing steel to corrosion and reducing fire resistance.
On Vision 2030 mega-projects with concrete pour volumes above 1,000 m³ per day, accessory reliability dictates pour cycle time. Galvanised steel, certified clamps, and adjustable jacks let crews strike and reset formwork on a 3 to 5 day cycle without repairs.
What are the specifications of formwork accessories?
Formwork accessories ship in galvanised or painted steel, with shoring jacks rated 20 to 35 kN, scaffold tubes 48.3 mm OD, clamps with 9 kN slip resistance, and spacers from 15 to 50 mm. Standards include EN 1065 for jacks, EN 74-1 for clamps, EN 39 for tubes, BS 7973 for spacers, and SBC 502 for site safety.
| Shoring jack range | 1.8 to 3.5 m adjustable |
|---|---|
| Shoring jack load | 20 to 35 kN by size |
| Scaffold tube OD | 48.3 mm |
| Scaffold tube wall | 3.2 to 4 mm |
| Scaffold tube lengths | 2, 3, 4, 5, 6 m |
| Clamp slip resistance | ≥ 9 kN per EN 74-1 |
| Clamp types | Fixed 90° and swivel |
| Spacer thicknesses | 15, 20, 25, 30, 40, 50 mm |
| Spacer materials | Plastic, concrete, fibre |
| Nail lengths | 25, 50, 75, 100, 150 mm |
| Screw diameters | 3.5, 4, 5, 6, 8 mm |
| Standards | EN 1065 · EN 74-1 · EN 39 · BS 1139 · BS 7973 · SBC 502 |
Where are formwork accessories used on construction sites?
Formwork accessories are used in slab support, column casting, scaffold erection, rebar cover, and timber fixing. Each accessory class maps to a phase: jacks support slabs, tubes and clamps build scaffolding, spacers position rebar, and nails and screws assemble timber forms.
- 01
Slab and beam shoring
Adjustable steel jacks at 1.2 to 1.5 m grid spacing support slab forms during the pour and 21-day cure. Capacity 20 to 35 kN per jack.
- 02
Scaffolding access frames
48.3 mm tubes joined by fixed and swivel clamps form working platforms on towers, facades, and infrastructure projects to EN 12810.
- 03
Rebar cover spacing
Plastic or concrete spacers at 60 cm centres hold the cover thickness specified in SBC 304 — 25 mm for slabs, 40 mm for beams, 50 mm for foundations.
- 04
Timber form assembly
Galvanised nails and screws fix plywood faces to timber bearers and stud frames at 20 to 30 cm spacing per the formwork drawing.
- 05
Steel modular formwork
Pre-engineered steel panels for high-rise columns, walls, and slabs delivering 200 to 300 reuse cycles on Vision 2030 sites.
How do formwork accessories compare with timber-only formwork systems?
Steel accessories deliver 200 to 300 reuse cycles versus 5 to 8 cycles for timber-only formwork. The capital outlay is 4 to 6 times higher, but on projects above 5,000 m² of formed surface the cost per cycle drops below SAR 8/m², compared to SAR 25/m² for timber-only systems.
Timber-only formwork remains valid for short-cycle residential pours and irregular shapes that defeat modular steel panels. Steel accessory systems become the working specification on towers, infrastructure, and any project where the same form geometry repeats more than 30 times.
Hybrid systems are common on Riyadh towers: steel jacks and scaffold frames support the dead load, with plywood face panels delivering the cast surface. This balances capital outlay with surface quality and complex geometry.
| Attribute | Steel accessory system | Timber-only formwork |
|---|---|---|
| Reuse cycles | 200 to 300 | 5 to 8 |
| Initial cost | High capital | Low capital |
| Cost per cycle | SAR 6 to 10 / m² | SAR 20 to 30 / m² |
| Pour-cycle time | 3 to 5 days | 5 to 7 days |
| Best fit | Towers, infrastructure | Villas, irregular shapes |
| Surface finish | Smooth steel cast | Plywood-grain cast |
| Standards | EN 1065, EN 13670 | SBC 304 |
How do I choose the right formwork accessories for my project?
Match each accessory to its load class and project scale: 20 kN jacks for residential slabs, 35 kN jacks for tower slabs, EN 74-1 clamps for any scaffold above 6 m, BS 7973 spacers for SBC 304 cover compliance. Volume above 5,000 m² of formed surface justifies modular steel panels over plywood and timber.
Project scale dictates accessory class. Villa work uses light-duty jacks, plywood faces, and timber bearers. Tower work requires heavy-duty jacks, modular steel formwork, and certified scaffold systems with engineer-stamped erection drawings.
Always verify the certificate of conformity for each accessory batch. EN 1065, EN 74-1, EN 39, and BS 7973 marks must appear on the part or its packaging — uncertified hardware is rejected by Saudi project consultants and Aramco/SABIC inspectors.
How are formwork accessories installed on a Riyadh site?
Installation follows the method statement: shoring jacks plumb to within 1° of vertical, scaffold tubes connected by clamps torqued to 50 Nm, spacers fixed to rebar at 60 cm centres, nails driven flush to timber bearers. Every component is inspected before each pour against the formwork drawing.
Shoring jacks set on timber sole plates over compacted ground, plumbed with a spirit level. Slab forms align with U-heads at the jack tops, set to formwork soffit elevation. Loaded jacks are checked at hour 1 and hour 4 of the pour for settlement.
Scaffold tubes are erected with base plates on sole boards, ledgers and transoms levelled, and bracing at every fourth bay. Clamps are torqued by ratchet to the manufacturer's spec. Crews log each tier on the inspection card before the next tier is built.
Do formwork accessories meet Saudi Building Code requirements?
Riyadh Timber's formwork accessories meet SBC 502 site-safety provisions and SBC 304 rebar cover requirements, with hardware certified to EN 1065 (jacks), EN 74-1 (clamps), EN 39 (tubes), BS 7973 (spacers), DIN 1151 (nails), and ISO 898-1 (screws). Each shipment includes mill certificates and load test reports.
Vision 2030 mega-projects — NEOM, Red Sea, Diriyah, Qiddiya, New Murabba — require third-party load testing on representative jacks and clamps from each shipment. Riyadh Timber ships test certificates with the goods and arranges on-site witness testing on request.
Which Saudi projects use formwork accessories from Riyadh Timber?
Riyadh Timber accessories support NEOM, Red Sea, Diriyah, Qiddiya, and New Murabba, the King Abdullah Financial District towers, Riyadh Metro stations, and high-rise residential projects across Olaya, Hittin, and Al Malqa. Volume contracts run from a single trailer load up to 40-trailer monthly drops.
- Vision 2030 mega-projects: NEOM, Red Sea, Diriyah, Qiddiya, New Murabba — modular formwork, shoring towers, scaffold frames.
- King Abdullah Financial District and Olaya towers — slab shoring, column formwork, facade scaffolding.
- Riyadh Metro stations and elevated viaducts — shoring jacks, concrete spacers, scaffold tubes.
- High-rise residential in Hittin, Al Malqa, Al Yasmin — slab support, scaffold erection, timber-form fixings.
What are common questions about formwork accessories?
**SAR 5,000** is the effective delivery minimum across the accessory range. Smaller orders are picked up from our Olaya yard, or are bundled with an existing project shipment near the contractor's site to absorb logistics cost.
We rent shoring jacks and modular steel formwork on **monthly contracts**, with rental prices set against project duration. Scaffold tubes, clamps, spacers, nails and screws are sale-only items. Rental contracts include delivery, return logistics, and replacement of any defective piece.
Shoring jacks at **20, 25, 30, and 35 kN**, scaffold clamps at 9 kN slip resistance, concrete spacers at 5 to 8 kN per piece. Heavy-duty 50 kN jacks for infrastructure work are available on 3 to 4 week order.
Yes. Our formwork accessories ship with **EN 1065, EN 74-1, EN 39, BS 7973** mill certificates and on-request third-party load test reports. These satisfy Aramco SAES-Q-001 and SABIC engineering-standard reviews on industrial projects.
Yes. Film-faced phenolic plywood at 18 mm pairs with our steel modular formwork to deliver smooth cast surfaces. The film face survives **30 to 50 form-pour cycles** when used with steel framing and release oil.
Standard accessories ship within **24 to 48 hours** of order confirmation from our Olaya yard. Modular steel formwork delivery depends on rental availability — typically 3 to 5 working days for a tower project mobilisation.
Our technical team supplies **scaffold erection drawings and shoring layout drawings** stamped by a Saudi-licensed engineer for any rental contract above SAR 50,000. Site supervision visits are included for the first lift on each project.
What products relate to Formwork accessories?
Selections that complement the work in Saudi construction projects.
Need a quote on formwork accessories for your project?
Send your formwork drawing or BOQ with site location and project duration. We respond with a formal rental and sale quote within 4 working hours — unit prices, total, lead time, and certificates included.