Hot-Rolled Ribbed Steel Bars

ZHONGTIAN offers Hot-rolled ribbed steel bars for construction material buyers, contractors, steel distributors, and infrastructure project suppliers. The bars are produced through a hot-rolling process, with surface ribs designed to improve mechanical interlock with surrounding concrete.

Common grades include HRB400E and HRB500E. The letter “E” identifies reinforcing steel with specified seismic performance requirements under the applicable standard. The grade required for a project should be selected according to the structural design, local regulations, and engineer's specifications rather than assumed from the building type alone.

Available Grades and Sizes

Selecting the correct specification helps buyers coordinate structural requirements, material quantities, transportation, and site installation.

Other lengths or specifications may be discussed according to production availability and project requirements. Buyers should confirm the exact grade, diameter, length, quantity, and applicable standard before placing an order.

How to Select the Right Rebar

The best specification depends on the structural design and construction conditions. A purchasing team should confirm the following points before requesting a quotation.

Match the Grade to the Design

HRB400E and HRB500E are common choices for reinforced concrete applications. Their required use depends on the structural calculations, specified steel grade, seismic design requirements, and applicable construction standards.

Higher nominal strength does not automatically make a grade suitable for every structure. Confirm the grade with the project engineer before substituting one specification for another.

Confirm Diameter and Length

Bar diameter affects the reinforcement arrangement and structural design. Length influences cutting plans, lap arrangements, transportation, and site handling. Common diameters range from 10 mm to 32 mm, with 9 m and 12 m lengths widely used.

When ordering, provide a diameter-by-length breakdown rather than only a total tonnage. This helps reduce misunderstandings about the required product mix.

Consider Site Handling

The delivery plan should account for unloading equipment, storage space, access roads, and the maximum practical bundle size. If the site has limited space or specific unloading arrangements, discuss packaging and delivery conditions before shipment.

Applications in Construction

Hot-rolled ribbed steel bars are used in reinforced concrete structures across residential, commercial, industrial, and infrastructure projects.

Residential and commercial buildings: Reinforcement is used in foundations, floor slabs, beams, columns, shear walls, and other structural members according to the approved design.

Industrial facilities: Factories, warehouses, and equipment foundations use reinforcing steel as part of their designed concrete structures.

Roads and bridges: Reinforcement can be specified for bridge components, road structures, retaining elements, and related infrastructure works.

Tunnels and municipal projects: Reinforcing bars may be used in designed tunnel linings, underground structures, utility corridors, and retaining structures.

Water conservancy works: Dams, reservoirs, water tanks, and flood-control structures may require reinforcing steel selected for the project's structural and environmental conditions.

Actual material selection and placement must follow the approved engineering drawings and applicable construction requirements.

Quality Checks and Documentation

For construction material procurement, verifying the supplied batch is as important as confirming the quoted specification. ZHONGTIAN orders can be arranged with product identification and quality documentation according to the agreed supply requirements.

Before dispatch, the relevant quality control and documentation arrangements should be confirmed for the order. The supplied material should be evaluated against the applicable product standard and purchase specifications.

Typical checks and records may include:

● Grade and product identification: Verify the stated grade, diameter, and batch or heat identification.

● Dimensional checks: Confirm bar diameter, length, and other applicable dimensional requirements.

● Mechanical properties: Review the applicable test results for yield strength, tensile properties, elongation, and other required characteristics.

● Bend performance: Check the required bending test results according to the applicable standard.

● Quality certificate: Match the certificate information to the delivered batch and purchase order.

● Third-party testing: Where required, arrange sampling and testing through an agreed qualified inspection organization.

The exact tests, sampling frequency, acceptance criteria, and documentation depend on the applicable standard and project requirements. Buyers should confirm these before shipment, particularly for large infrastructure projects or projects with strict material approval procedures.

Delivery and Order Planning

A well-prepared purchase order helps reduce specification errors and supports smoother delivery to the construction site.

When requesting a quotation from ZHONGTIAN, provide the following information:

● Required steel grade, such as HRB400E or HRB500E.

● Diameter and length for each specification.

● Total quantity or tonnage, including the quantity breakdown by size.

● Applicable national or project-specific standard.

● Required quality certificates and inspection reports.

● Delivery destination, unloading conditions, and target delivery date.

● Packaging, labeling, and export documentation requirements, where applicable.

For export orders, buyers should also confirm the destination market's import requirements, shipping terms, required documentation, and any applicable product acceptance procedures. Delivery schedules should be confirmed after the specification, quantity, production availability, and transport arrangements have been reviewed.

Frequently Asked Questions

What is the difference between HRB400E and HRB500E?

They are different reinforcing steel grades with different specified mechanical properties. The “E” suffix indicates additional seismic performance requirements under the applicable standard. The correct grade should follow the approved structural design and local requirements.

Can the bars be supplied in lengths other than 9 m and 12 m?

The common lengths are 9 m and 12 m. Other lengths may be discussed based on production availability, order quantity, transport conditions, and project requirements. Confirm the requested length before ordering.

What should I check when the steel arrives at the construction site?

Check the bundle labels, grade, diameter, quantity, visible condition, and accompanying quality certificate. Confirm that the batch information matches the purchase documents. If project rules require incoming inspection or third-party testing, complete those procedures before the material is accepted for use.

Why do reinforcing bars have ribs on the surface?

The longitudinal and transverse ribs help improve the bond and mechanical interlock between the steel and concrete. The overall structural performance still depends on correct design, concrete quality, reinforcement placement, cover, and construction practices.

Which standard should be specified in a new order?

For current Chinese national requirements, the applicable standard is GB 1499.2-2024, which replaced GB/T 1499.2-2018. Project specifications, destination-market requirements, and contract terms should also be reviewed before the purchase order is finalized.

Can I request third-party inspection before shipment?

Third-party inspection can be discussed during order negotiation. Specify the inspection organization or qualification requirements, sampling method, test scope, acceptance criteria, and reporting requirements before confirming the order.

Request a Rebar Quotation from ZHONGTIAN

ZHONGTIAN supplies reinforcing steel for construction and infrastructure procurement. Whether you are purchasing for a building project, industrial facility, bridge, road, tunnel, or water conservancy project, providing complete technical and delivery information helps establish a clear quotation basis.

Send your required grades, diameters, lengths, quantities, applicable standards, delivery destination, and documentation requirements to discuss your order.

Contact ZHONGTIAN

For product availability, technical specifications, quality documents, and domestic or export supply arrangements, contact the ZHONGTIAN sales team.