Joint-Type Scaffolding Testing Machine JB-117 by Jiubin Instruments

Overview

The Joint-Type Scaffolding Testing Machine JB-117 is a high-precision universal testing system engineered specifically for mechanical performance evaluation of bowl-lock scaffolding components in accordance with GB 24911–2010 (Steel Tubular Scaffolding Components – Bowl-Lock Type) and GB 15831–2006 (Steel Pipe Scaffolding Couplers). Designed around a rigid dual-column load frame and integrated servo-hydraulic or electromechanical actuation (model-dependent), the system applies controlled axial tension, compression, and torsional loading to standardized couplers—including right-angle, swivel, and对接 (butt-joint) types—as well as base plates and sole plates. Measurement principles adhere to standardized force-displacement transduction via calibrated load cells and high-resolution linear variable differential transformers (LVDTs), ensuring traceability to national metrological standards. The machine operates under deterministic closed-loop control algorithms, enabling precise execution of multi-step test protocols defined by construction material testing standards. Its architecture supports both static monotonic loading and quasi-static cyclic procedures required for stiffness, slip resistance, ultimate failure, and deformation recovery assessments.

Key Features

• Rigid four-column or dual-column structural frame with preloaded crosshead guidance for minimal deflection under maximum rated load (up to 300 kN)
• Digital servo-control system with real-time PID tuning, enabling stable force ramping, displacement tracking, and load holding with ≤±0.5% deviation
• Modular fixture interface compliant with ISO 26203-1:2012, supporting rapid interchange of coupler-specific grips: right-angle anti-slip fixtures, swivel coupler torsion adapters, butt-joint tensile clamps, and base plate compression platens
• High-fidelity data acquisition at 100 kHz sampling rate, synchronized across load, displacement, and optional strain channels
• Integrated safety interlocks including emergency stop circuitry, overload cut-off, and mechanical limit switches conforming to ISO 13857 and EN 60204-1
• Calibration certificate traceable to CNAS-accredited laboratories; supports interval verification per JJG 139–2014 and GB/T 16825–2008

Sample Compatibility & Compliance

The JB-117 accommodates standard Ø48.3 mm scaffolding tubes (per GB/T 3091–2015) and all associated bowl-lock components defined in GB 24911–2010, including forged steel couplers, pressed steel base plates, and adjustable U-heads. It also accepts auxiliary test specimens such as fall arrest harness webbing (EN 361), safety netting (GB/T 5725–2009), and structural steel coupons (ASTM A370). Regulatory alignment includes full support for GB, ISO, ASTM, EN, and JIS test methods—particularly GB/T 228.1–2021 (tensile), GB/T 7314–2017 (compression), GB/T 14452–1993 (bending), and ASTM E21–2022 (elevated temperature tensile). All software workflows comply with GLP/GMP documentation requirements, including electronic signatures, change history logs, and audit trail generation per FDA 21 CFR Part 11.

Software & Data Management

The embedded Windows-based testing software provides ISO/IEC 17025-compliant test sequencing, real-time curve plotting (load vs. displacement, torque vs. angle), and automated parameter extraction—including yield load, ultimate load, residual slip, rotational stiffness (k = ΔM/Δθ), and elastic modulus. Reports are exportable in PDF, Excel, and XML formats, with customizable templates meeting internal QA and third-party accreditation needs. Role-based access control (administrator, operator, reviewer) enforces procedural integrity. All raw data files are digitally signed and time-stamped; version-controlled backups are retained locally and optionally mirrored to network-attached storage (NAS) systems.

Applications

This system serves quality assurance laboratories in scaffold manufacturing plants, third-party inspection agencies (e.g., SGS, BV, CTI), municipal construction supervision centers, and national building material testing institutes. Typical use cases include type approval testing of new coupler designs, batch conformity verification against GB 24911–2010 Annex B, root-cause analysis of field failures, and R&D validation of alternative materials (e.g., aluminum alloy couplers, composite base plates). It is also deployed in university civil engineering labs for structural behavior modeling and in certification bodies conducting CNAS-accredited testing for CE marking and CCC certification.

FAQ

Does the JB-117 meet international scaffolding standards beyond Chinese GB specifications?
Yes—it natively supports test sequences aligned with EN 12811-1 (temporary works equipment), BS 1139-1 (steel scaffolding), and ASTM F2981 (scaffold coupler performance), provided appropriate fixtures and calibration are applied.
Can the system perform cyclic fatigue testing on couplers?
While primarily configured for static and quasi-static tests, optional add-on modules enable low-cycle fatigue protocols (10²–10⁴ cycles) with programmable load reversal and dwell timing.
Is remote diagnostics and software update capability available?
Yes—the controller supports secure TLS-encrypted remote maintenance via authenticated VPN connection, subject to customer IT policy approval.
What documentation is supplied for regulatory audits?
Full technical file: Factory calibration report, installation qualification (IQ), operational qualification (OQ), performance qualification (PQ) protocol templates, software validation summary, and 21 CFR Part 11 compliance statement.
Are custom fixture designs supported for non-standard coupler geometries?
Jiubin Instruments offers engineering consultation and CAD-supported custom grip development under NDA, with mechanical drawings delivered for end-user review prior to fabrication.