Clamps, hooks & attachments

Professional Clamps, Hooks and Fasteners for Event Technology

When it comes to professional event technology, reliable fastening systems are the foundation of every safe installation. Clamps, hooks and fasteners form the essential connection between truss systems, lighting equipment, audio gear and rigging infrastructure. At LTT, you'll find a comprehensive range of TÜV-certified rigging hardware designed for demanding stage and event applications. Whether you're mounting moving heads on Naxpro-Truss systems, securing speaker arrays or building complex stage constructions – our fastening solutions deliver the load capacity, safety standards and installation speed professionals demand.

From compact omega brackets for lightweight fixtures to heavy-duty double clamps with 750 kg tensile strength, our portfolio covers every fastening scenario in modern event technology. All products comply with DGUV Regulation 17 (formerly BGV C1) and are engineered for the specific requirements of touring productions, permanent installations and temporary event setups. With brands like Riggatec, Eurolite and Manfrotto, you're choosing proven quality that event technicians, stage builders and lighting designers trust worldwide.

What Are Clamps, Hooks and Fasteners in Event Technology?

Clamps, hooks and fasteners are specialised rigging hardware components designed to securely attach equipment, fixtures and structural elements to truss systems, pipes and mounting surfaces. Unlike general-purpose construction clamps, event technology fasteners are engineered for dynamic loads, frequent assembly/disassembly cycles and compliance with strict safety regulations governing suspended loads.

Half clamps (also called single clamps) feature a C-shaped body with a threaded bolt and wing nut, designed to wrap around a single tube. They're ideal for mounting lighting fixtures, small speakers or decorative elements to truss pipes with diameters ranging from 30 mm to 80 mm. Load capacities typically range from 50 kg to 350 kg depending on material thickness (2.5 mm to 5 mm) and tube diameter compatibility.

Double clamps connect two parallel tubes or secure equipment between two mounting points. With tensile strengths up to 750 kg, they're the go-to solution for heavy-duty applications like motor chain attachments, large speaker clusters or structural reinforcement. The galvanised steel construction ensures corrosion resistance even in outdoor or high-humidity environments.

Hooks come in multiple variants: theatre hooks with quick-release mechanisms for rapid fixture changes during shows, selflock hooks that automatically secure loads without additional fastening steps, and swivel hooks that allow angular adjustment for precise fixture positioning. Carabiner-style hooks offer tool-free operation for temporary installations.

Omega brackets provide wall-mounting solutions with adjustable wall distances from 11 cm to 22 cm, accommodating various tube diameters and offering load ratings between 100 kg and 400 kg. They're essential for permanent installations in theatres, clubs and houses of worship.

Compared to general rigging accessories like slings or shackles, clamps and hooks offer faster installation, tool-free adjustment (in many models) and precise positioning – critical advantages when building complex lighting rigs or multi-point speaker arrays under time pressure.

Applications: Where Clamps, Hooks and Fasteners Are Essential

Professional fastening systems are indispensable across every segment of event technology. In touring productions, half clamps and selflock hooks enable rapid fixture mounting on Naxpro FD31 or HD31 truss systems, where installation speed directly impacts setup time and labour costs. A typical touring lighting rig might use 200+ clamps per show, making reliable quick-release mechanisms essential.

Permanent installations in theatres, concert halls and broadcast studios rely on double clamps and omega brackets for suspended lighting grids, motorised hoists and cable management systems. Here, TÜV certification and DGUV 17 compliance aren't optional – they're legal requirements. Wall distances of 20–25 cm provided by omega brackets ensure adequate clearance for cable routing and heat dissipation from high-wattage fixtures.

Corporate events and trade shows demand versatile fastening solutions that adapt to varying booth structures and ceiling heights. Theatre hooks with swivel functionality allow precise aiming of spotlights on product displays, while carabiner hooks enable tool-free attachment of decorative elements or branding materials to temporary truss structures.

Mobile DJs and bands benefit from lightweight half clamps (typically 0.06–0.23 kg) that don't add significant transport weight but provide secure mounting for LED pars, moving heads or small speaker satellites on compact truss systems like Litetruss or Junior-Truss.

Outdoor festivals require galvanised or black-finished clamps that resist weather exposure. Double clamps with 750 kg load ratings secure delay towers, line array rigging points and weather protection structures against wind loads and dynamic stresses from crowd movement.

The compatibility between fastening systems and truss types is critical: Naxpro FD21-24 systems with 35 mm diameter tubes require different clamp sizes than FD31-44 or HD31-44 systems with 50 mm tubes. Always verify tube diameter specifications before purchasing to ensure proper fit and load transfer.

Quality Standards and Professional Selection Criteria

Selecting the right clamps, hooks and fasteners requires understanding the technical specifications that separate professional-grade hardware from consumer products. Load capacity is the primary criterion: a half clamp rated for 150 kg might suffice for a 10 kg LED par, but professional practice demands a safety factor of at least 5:1 for dynamic loads. This means a 50 kg moving head should use clamps rated for minimum 250 kg.

Material composition and surface finish directly impact longevity and safety. Galvanised steel offers excellent corrosion resistance for outdoor applications and humid environments, with material thicknesses of 2.5 mm for light-duty applications up to 5 mm for heavy-duty double clamps. Aluminium painted finishes provide lighter weight (important for touring) while black powder-coated surfaces reduce light reflection in stage environments.

TÜV certification verifies that fastening systems meet German safety standards for suspended loads. Every certified clamp carries a load rating stamp and batch number for traceability. DGUV Regulation 17 (the successor to BGV C1) mandates annual inspection of all rigging hardware in professional use – non-certified products cannot legally be used in commercial event applications in Germany and many EU countries.

Tube diameter compatibility ranges from 30 mm (common in lightweight DJ truss) to 80 mm (heavy-duty stage rigging). Naxpro FD31-44 and HD31-44 systems use 50 mm diameter tubes with 2 mm and 3 mm wall thickness respectively, requiring clamps with corresponding internal dimensions. GS94 truss with 60 mm diameter tubes and 5 mm wall thickness demands heavy-duty clamps with wider jaw openings.

Premium brands like Riggatec, Eurolite and Manfrotto distinguish themselves through consistent manufacturing tolerances (critical for proper load distribution), comprehensive documentation including load tables and installation instructions, and readily available replacement parts. A Riggatec double clamp typically costs €15–35 depending on load rating, while professional theatre hooks range from €8–25. Budget alternatives may save 30–40% initially but often lack certification, use thinner materials and fail prematurely under repeated use.

Price-performance considerations: For permanent installations, invest in TÜV-certified heavy-duty clamps with galvanised finish (€20–40 per unit). For mobile applications with frequent setup/teardown, prioritise quick-release mechanisms and lightweight aluminium construction (€12–28). For occasional use in controlled environments, standard half clamps with wing nuts offer adequate performance at €6–15.

DGUV Regulation 17 Compliance: Safety Standards for Rigging Hardware

DGUV Regulation 17 (formerly BGV C1) governs the safe use of event technology equipment in Germany and serves as the reference standard across much of Europe. For clamps, hooks and fasteners, compliance means meeting specific requirements for load ratings, inspection intervals and documentation.

Legal Requirements for Professional Use

Every clamp or hook used to suspend equipment above people must carry a visible load rating and manufacturer identification. The rated load must account for dynamic factors: a fixture that weighs 20 kg statically might generate 40 kg of force during transport vibration or rapid movement. Professional fastening systems include a built-in safety factor (typically 5:1 for static loads, 8:1 for dynamic applications).

Annual inspection by a qualified person is mandatory for all rigging hardware in commercial use. Inspections check for deformation, crack formation, thread wear and corrosion. Any clamp showing visible damage, missing load markings or exceeding manufacturer-specified service life must be removed from service immediately. Documentation of inspections must be retained for audit purposes.

Practical Compliance in Event Scenarios

When mounting a moving head on a Naxpro HD31-44 truss using half clamps, the installation must ensure the clamp's load rating exceeds the fixture weight by the required safety factor, the tube diameter matches the clamp specification (50 mm in this case), and the clamp is fully tightened with all threads engaged. Wing nuts must be secured to prevent loosening from vibration.

For multi-point suspensions using double clamps, load distribution must be calculated to prevent overloading individual fastening points. A 100 kg speaker array suspended from four points doesn't simply divide to 25 kg per clamp – dynamic loads and angular forces can create significantly higher stresses on individual fasteners.

Omega brackets for wall mounting require verification of wall load capacity and appropriate anchor selection. A bracket rated for 400 kg is useless if mounted into drywall with inadequate anchors. Concrete or masonry walls require expansion anchors rated for the combined load of bracket, equipment and dynamic safety factor.

Brand-Specific Compliance Features

Riggatec fastening systems include laser-etched load ratings that remain legible throughout the product lifecycle, colour-coded safety markings for quick visual inspection, and comprehensive technical documentation including load tables for various tube diameters and mounting angles. Eurolite omega brackets feature pre-drilled mounting holes with specified anchor sizes, eliminating guesswork during installation. These details transform compliance from a bureaucratic burden into a streamlined safety protocol that protects both personnel and equipment.

Installation Techniques for Professional Stage Rigging

Proper installation of clamps, hooks and fasteners requires understanding both the mechanical principles and the practical techniques that ensure safe, reliable connections. Even TÜV-certified hardware fails if installed incorrectly.

Half Clamp Installation Best Practices

When mounting a fixture to truss using a half clamp, position the clamp body so the threaded bolt approaches from the side with the most clearance – this prevents interference with adjacent fixtures and allows full thread engagement. Tighten the wing nut until the clamp body makes firm contact with the tube around its entire circumference. Over-tightening can deform aluminium tubes (especially on Litetruss or Junior-Truss systems with thinner walls), while under-tightening allows the fixture to rotate or slip.

For fixtures with offset centre of gravity (like moving heads with extended yokes), position the clamp as close to the centre of mass as possible. A moving head mounted with the clamp near the rear creates a lever arm that multiplies stress on the fastening point. If the fixture design doesn't allow optimal clamp placement, use two clamps spaced 15–20 cm apart to distribute the load.

Double Clamp Applications

Double clamps excel at connecting parallel truss sections or creating rigid mounting points for heavy equipment. When joining two truss tubes, ensure both tubes sit fully in their respective clamp channels before tightening. Partial engagement reduces load capacity by 40–60% and creates stress concentration points that accelerate fatigue failure.

For motor chain attachments, double clamps must be oriented so the load vector aligns with the clamp's strongest axis (typically perpendicular to the bolt axis). Side-loading a double clamp can reduce its effective capacity by half. Always consult the manufacturer's load tables for angular load ratings.

Hook System Techniques

Theatre hooks with quick-release mechanisms require proper engagement verification: the locking pin must fully seat in its detent, and the safety clip (if present) must be closed. A partially engaged hook can disengage under vibration or dynamic load. Selflock hooks automatically secure when loaded, but you must verify the locking mechanism has engaged by attempting to lift the hook off the mounting point while the fixture is supported.

Swivel hooks allow angular adjustment but introduce a potential failure point if the swivel mechanism isn't properly tightened after positioning. The swivel bolt must be torqued to manufacturer specifications – typically 15–20 Nm for M10 threads, 25–30 Nm for M12.

Compatibility with Naxpro-Truss Systems

Naxpro FD21-24 systems with 35 mm tubes require clamps with 30–40 mm internal diameter range. FD31-44 and HD31-44 systems (50 mm tubes) need 48–52 mm clamps. The 2 mm wall thickness difference between FD31 and HD31 doesn't affect clamp selection, but it does impact overall system load capacity – always calculate based on the truss specification, not just the clamp rating.

GS94 heavy-duty truss (60 mm tubes, 5 mm walls) demands clamps specifically designed for larger diameters. Using a 50 mm clamp on a 60 mm tube leaves gaps that prevent proper load transfer and violates safety standards.

LTT – Your Specialist for Event Technology Fastening Solutions

At LTT, we understand that reliable fastening systems are the invisible foundation of every successful event. With over 25 years of experience in professional event technology and our own manufacturing facility in Germany, we offer not just products but comprehensive rigging expertise. Our portfolio includes TÜV-certified clamps, hooks and fasteners from premium brands like Riggatec, Eurolite and Manfrotto, alongside our own Naxpro-Truss compatible fastening systems engineered for seamless integration with our truss products.

Every fastening component in our range meets DGUV Regulation 17 requirements and carries full technical documentation including load tables, installation instructions and inspection guidelines. Whether you're building a touring production rig, installing a permanent theatre lighting system or setting up a mobile DJ setup, you'll find the right fastening solution with the load capacity, material quality and certification your application demands.

We ship worldwide from our facility in Bocholt, Germany, with free shipping on orders over €69 and express delivery options for time-critical projects. Our three-year LTT guarantee covers all fastening hardware, and our technical support team provides expert advice on clamp selection, load calculations and compliance requirements. For trade customers and resellers, we offer wholesale pricing and volume discounts on bulk orders.

Discover our complete range of professional event technology solutions – from Naxpro-Truss systems and Riggatec rigging accessories to lighting, audio and stage equipment. When safety, quality and professional performance matter, LTT is your reliable partner.

FAQ – Questions & Answers