European Technical Assessment ETA-18/0879
Nine ERGO staple series have been assessed as fasteners for load-bearing timber structures. The assessment was issued on 17 January 2019 by Deutsches Institut für Bautechnik (DIBt), Berlin.
It covers staples with wire diameters of 1.53 mm, 1.80 mm and 2.00 mm, with resin coating.
Assessment details
| Reference | ETA-18/0879 |
|---|---|
| Date of issue | 17 January 2019 |
| Technical Assessment Body | Deutsches Institut für Bautechnik, Berlin |
| Issued on the basis of | EAD 130019-00-0603 |
| Product family | Dowel-type fasteners with resin coating |
| AVCP system | 3 |
| Notified body | VHT 1503 |
| Manufacturer | Ergo staples Ltd., Vladimira Nazora 78, Lužani, Croatia |
| Manufacturing plant | Vladimira Nazora 221, Lužani |
Series covered
| Wire diameter | Series | Length | Version |
|---|---|---|---|
| 1.53 mm | 155, 700, 700G, S4, S16, WP | 22–80 mm | galvanised or stainless |
| 1.80 mm | 180 | 32–90 mm | galvanised only |
| 2.00 mm | 29, 9100 | 35–170 mm | galvanised or stainless |
Other series in our programme are not covered by this assessment.
Material
Galvanised wire carries a mean zinc coating of at least 12 µ. The stainless version is made of steel no. 1.4301 / AISI 304 to EN 10088-1.
Minimum tensile strength of the wire is 900 N/mm², the same for both versions.
At least 50 % of the leg length is resin coated, type 3 to DIN EN 14592:2008+A1:2012. The coating is not an option but a condition of the assessment — the product family in the ETA is dowel-type fasteners with resin coating.
Points
The assessment covers five point types:
C · IC · OC · DP · CD
Point angle is 80° ± 10°.
Declared performance
Characteristic yield moment My,k per leg, in Nm:
| Wire diameter | Galvanised | Stainless |
|---|---|---|
| 1.53 mm | 0.59 | 0.63 |
| 1.80 mm | 0.81 | – |
| 2.00 mm | 1.08 | 1.26 |
Characteristic withdrawal parameter fax,k per leg, short- and medium-term loads, in N/mm²:
| Wire diameter | Galvanised | Stainless |
|---|---|---|
| 1.53 mm | 6.4 | 5.1 |
| 1.80 mm | 5.9 | – |
| 2.00 mm | 5.3 | 5.8 |
Valid for a characteristic density of ρk ≥ 350 kg/m³ and an angle of at least 30° between the staple crown and the direction of the grain.
Long-term and permanent loads, design value of withdrawal capacity per staple:
Rax,d = 70 N, withγM = 1.3
Service class 1 and 2, atρk ≥ 350 kg/m³
Head pull-through parameter fhead,k, in N/mm², for ρk ≥ 350 kg/m³ and a crown up to 27 mm:
| Wire diameter | Crown | fhead,k |
|---|---|---|
| 1.53 mm | 10.5 and 26.1 mm | 33 |
| 1.80 mm | 11.1 mm | 28 |
| 2.00 mm | 11.6 and 26.5 mm | 27 |
Reaction to fire: Euroclass A1.
Working life: the assessment assumes a working life of at least 50 years. This is not a guarantee given by the manufacturer, but a means of choosing the right product against the expected working life of the works.
Where they may be installed
Base building components
- solid timber (softwood) to EN 338 and EN 14081-1
- glued laminated timber (softwood) to EN 14080
- glued solid timber to EN 14080
- laminated veneer lumber LVL to EN 14374
- cross-laminated timber to European Technical Assessments or to national provisions applying at the installation site
Connected building components
- oriented strand board OSB to EN 300 and EN 13986
- plywood to EN 636 and EN 13986
- cement-bonded particleboards to EN 634-2 and EN 13986
- fibreboards to EN 622-2, EN 622-3 and EN 13986
- LVL to EN 13986 in connection with EN 14279
- solid wood panels to EN 13353 and EN 13986
- gypsum boards to EN 520, density at least 680 kg/m³, excluding Type D; Type D at least 800 kg/m³
- gypsum boards with mat reinforcement to EN 15283-1 and gypsum fibre boards to EN 15283-2
- fibre-cement flat sheets to EN 12467
- wood fibre thermal insulation to EN 13171
Loads are static and quasi-static, not relevant to fatigue. Short-term, medium-term, long-term and permanent withdrawal and shear are covered.
Conditions of installation
EN 1995-1-1 (Eurocode 5) with the relevant national annex applies to design and execution.
| Point side penetration | at least 14 × d |
|---|---|
| Withdrawal values valid for | 14 × d ≤ t₂ ≤ 20 × d |
| Maximum crown for calculation | 27 mm |
Maximum thickness of the connected component depends on density:
| Density ρk (kg/m³) | Maximum thickness | Example |
|---|---|---|
| ≤ 400 | 80 mm | solid softwood |
| 400 – 650 | 60 mm | wood-based panels and solid timber |
| 650 – 900 | 40 mm | wood-based panels and gypsum boards |
| 900 – 1200 | 25 mm | hardboards and gypsum fibreboards |
| 1200 – 1600 | 20 mm | highly compressed gypsum fibreboards |
For connections to wood fibre insulation the leg is at most 85 × d, the crown at least 20 mm and the insulation at most 70 × d. For d = 2.00 mm, insulation with a mean density of at least 200 kg/m³ and a thickness of at least 60 mm, the head pull-through parameter is 8.85 N/mm².
Declaration of Performance
A Declaration of Performance, DoP 3/2019 of 11 February 2019, has been issued alongside the European Technical Assessment.
