oSIST prEN 16031:2010
(Main)Adjustable telescopic aluminium props - Product specifications, design and assessment by calculation and tests
Adjustable telescopic aluminium props - Product specifications, design and assessment by calculation and tests
This European Standard specifies materials, design requirements, corrosion protection alternatives together with assessment methods using both calculation and testing for open thread and covered thread adjustable telescopic aluminium props which are intended for use on construction sites.
Baustützen aus Aluminium mit Ausziehvorrichtung - Produktfestlegungen, Bemessung und Nachweis durch Berechnung und Versuche
Diese Europäische Norm legt für Baustützen aus Aluminium mit Ausziehvorrichtung, die für die Verwendung auf Baustellen bestimmt sind, Werkstoffe, Konstruktion, Bezeichnung, Korrosionsschutzalternativen sowie Nachweisverfahren durch Berechnung und Versuch fest. Das Innen und Außenrohr der Baustützen wird aus Aluminium oder aus Aluminium und Stahl hergestellt.
Diese Europäische Norm legt fünf Klassen nominell festgelegter Werte der Tragfähigkeit für Baustützen aus Aluminium mit Ausziehvorrichtung fest. Jede Klasse hat eine Reihe maximaler Auszugslängen.
Etais télescopiques réglables en aluminium - Spécifications du produit, conception et évaluation par calculs et essais
La présente Norme Européenne spécifie les matériaux, les exigences de conception, la désignation, les différentes protections contre la corrosion, ainsi que les méthodes d’évaluation utilisant les calculs et les essais pour les étais télescopiques réglables en aluminium qui sont prévus pour une utilisation sur des chantiers de construction. Le tube intérieur et extérieur des étais est fabriqué en aluminium ou en aluminium et en acier.
La présente Norme spécifie onze classes de résistance caractéristique nominale pour les étais télescopiques réglables en aluminium, chacune ayant une série de longueurs d’extension maximale.
Nastavljive aluminijaste teleskopske podpore - Specifikacije izdelka, oblikovanje in ocena z izračunom in preskusi
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 16031:2010
01-marec-2010
1DVWDYOMLYHDOXPLQLMDVWHWHOHVNRSVNHSRGSRUH6SHFLILNDFLMHL]GHONDREOLNRYDQMHLQ
RFHQD]L]UDþXQRPLQSUHVNXVL
Adjustable telescopic aluminium props - Product specifications, design and assessment
by calculation and tests
Baustützen aus Aluminium mit Ausziehvorrichtung - Produktfestlegungen, Bemessung
und Nachweis durch Berechnung und Versuche
Etais télescopiques réglables en aluminium - Spécifications du produit, conception et
évaluation par calculs et essais
Ta slovenski standard je istoveten z: prEN 16031
ICS:
91.220 Gradbena oprema Construction equipment
oSIST prEN 16031:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 16031:2010
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oSIST prEN 16031:2010
EUROPEAN STANDARD
DRAFT
prEN 16031
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2009
ICS
English Version
Adjustable telescopic aluminium props - Product specifications,
design and assessment by calculation and tests
Etais télescopiques réglables en aluminium - Spécifications Baustützen aus Aluminium mit Ausziehvorrichtung -
du produit, conception et évaluation par calculs et essais Produktfestlegungen, Bemessung und Nachweis durch
Berechnung und Versuche
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 53.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16031:2009: E
worldwide for CEN national Members.
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prEN 16031:2009 (E)
Contents Page
Foreword .4
Introduction .4
1 Scope .4
2 Normative references .4
3 Definitions .7
3.1 adjustable telescopic aluminium prop .7
3.2 endplate .7
3.3 collar nut .7
3.4 inner tube .7
3.5 outer tube .7
3.6 length at maximum extension .7
3.7 length at minimum extension .7
3.8 safety devices .7
3.9 pin .7
3.10 working load .8
4 Symbols .8
5 Classification .9
6 Designations . 10
7 Materials . 10
7.1 General . 10
7.2 Corrosion protection for steel . 10
8 Requirements . 11
8.1 Tubes . 11
8.2 Welding . 11
8.3 Length adjustment device . 11
8.4 Permanent prevention against unintentional disengagement . 11
8.5 Anti hand trap . 12
8.6 Overlapping length . 12
9 Endplates . 13
10 Nominal characteristic strength . 13
11 Documentation of test results . 14
11.1 General . 14
11.2 Verification of the actual characteristic strength by calculation . 14
11.3 Confirmation of the calculation results by testing . 20
11.4 Verification of the strength of length adjustment device . 20
11.5 Verification of the prevention against unintentional disengagement . 20
12 Test . 21
12.1 General . 21
12.2 Detail tests . 21
12.3 Test of the prevention against unintentional disengagement . 28
12.4 The evaluation of confirmation test for the prop strength . 29
12.5 Test of pin and its support . 29
13 Documentation of test results . 29
14 Marking . 29
15 Assessment . 30
2
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16 User manual . 30
Annex A (normative) Equations for the calculations of structural properties of tubes . 31
Annex B (normative) Calculation of resistance for pin connections . 33
B.1 Calculate the shear resistance per shear plane R using the following equation: . 33
s,p
B.2 Calculate the bearing resistance of the tube R using the following equation: . 33
b,t
Annex C (informative) Ongoing production control . 34
3
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Foreword
This document (prEN 16031:2009) has been prepared by Technical Committee CEN/TC 53 “Temporary works
equipment”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
Introduction
Whilst this European Standard deals with the more common types of adjustable telescopic aluminium props in
use, it is not intended to prevent development of other types of props. For example, props may have hinged
ends or other length adjustment devices or be made of other materials. Whilst such props cannot comply with
this European Standard it is recommended that the principals of this European Standard should be considered
in the design and assessment of such props.
This European Standard is a product standard primarily for use in the field of falsework and formwork
standardized in EN 12812.
The specified values for load bearing capacity listed in this European Standard are figures for classification.
For site use γ and γ can be found in EN 12812
F m
1 Scope
This European Standard specifies materials, design requirements, designation, corrosion protection
alternatives, together with assessment methods using both calculations and testing for adjustable telescopic
aluminium props which are intended for use on construction sites . Inner and outer tube of props are made in
aluminium or aluminium and steel
It specifies eleven classes of nominal specified values for strengths for adjustable telescopic aluminium props
each having a series of maximum extended lengths.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 39, Loose steel tubes for tube and coupler scaffolds. Technical delivery conditions.
EN 74-1, Couplers, spigot pins and baseplates for use in falsework and scaffolds – Part 1: Couplers for
tubes – Requirements and test procedures.
EN 74-2, Couplers, spigot pins and baseplates for use in falsework and scaffolds – Part 2: Special couplers –
Requirements and test procedures.
EN 1999-1:1998, Eurocode 9: Design of aluminium structures - Part 1-1: General rules; general rules and
rules for buildings
4
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EN 1065:1998, Adjustable telescopic steel props- Product specifications, design and assessment by
calculation and tests.
EN 1090-2, Execution of steel structures and aluminium structures - Part 2: Technical requirements for the
execution of steel structures
EN 1090-3, Execution of steel structures and aluminium structures - Part 3: Technical requirements for
aluminium structures
EN 10204, Metallic materials. Types of inspection documents.
EN 10210-1, Hot finished structural hollow sections of non-alloy and fine grain steels - Part 1: Technical
delivery conditions
EN 10210-2, Hot finished structural hollow sections of non-alloy and fine grain steels - Part 2: Tolerances,
dimensions and sectional properties
EN 10219-1, Cold formed welded structural hollow sections of non-alloy and fine grain steels - Part 1:
Technical delivery conditions
EN 10219-2, Cold formed welded structural hollow sections of non-alloy and fine grain steels - Part 2:
Tolerances, dimensions and sectional properties
EN 12811-1, Temporary works equipment – Part 1: Scaffolds – Performance requirements and general
design.
EN 12811-2:2004, Temporary works equipment – Part 2: Information on materials.
EN 12811-3:2003, Temporary works equipment – Part 3: Load testing.
EN 12812, Falsework — Performance requirements and general design.
ISO 2937, Plain and seamless steel tubes for mechanical application
ISO 418, Iron ores. Determination of aluminium content. EDTA titrimetric method
ISO 424, Iron ores. Determination of titanium content. Diantipyrylmethane spectrophotometric method
ISO 3629, Specification for photographic grade potassium metabisulphite
5
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Key
a) open thread =DO b) covered thread =DO
1 Endplate
2 Outer tube
3 Inner tube
4 Length adjustment device
4.1 attached pin
4.2 Collar nut
4.3 Handle
5 entral hole
6 Connection holes
7 Pin hole
Figure 1 — Example of adjustable telescopic aluminium prop (type 1)
6
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Key
1 endplates
2 outer tube
3 inner tube
4 Length adjustment device (collar)
5 locking (security) device
Figure 2 — Example of Adjustable telescopic aluminium prop (type 2)
3 Definitions
For the purposes of this European Standard the following definitions apply.
3.1 adjustable telescopic aluminium prop
compression member normally used as temporary vertical support in construction works. A prop consists of
two tubes which are telescopically displaceable within each other with a length adjustment device with
threaded inner tube (see Figure 2) or with a pin inserted into hole in the inner tube and a mean of fine
adjustment using a threaded collar (see Figure 1).
Tubes could be profiled. Inner and outer tubes are made in aluminium or aluminium and steel.
3.2 endplate
plate which is fixed at right angles to one end of inner and outer tube
3.3 collar nut
nut internally threaded to provide fine length adjustment to the prop to transfer the force from the inner to the
outer tube
3.4 inner tube
smaller profiled tube provided with thread or holes for the coarse adjustment of the prop
3.5 outer tube
larger profiled tube one end of which could be threaded externally ( see Figure.1)
3.6 length at maximum extension
nominal distance measured between the outside faces of the endplates when the prop is in the fully extended
position (fully opened)
3.7 length at minimum extension
nominal distance between the outside faces of endplates when the prop is in the fully closed position
3.8 safety devices
devices to prevent unintentional disengage of the inner and outer tube and/or devices to guarantee the
minimum overlapping length
3.9 pin
part of the length adjustment device which is inserted through the inner tube holes and is secured to the prop
7
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3.10 working load
nominal characteristic strength of the prop divided by at least the safety factors given for different classes in
EN 12812
NOTE Safety factors can by greater in national regulations.
4 Symbols
Number Symbol Denomination Unit
1 D Outer diameter of the inner tube mm
2 Collar nut major thread diameter mm
D
m
3 Diameter of the pin mm
D
p
4 e Eccentricity at the base at which the spring becomes mm
b,core
effective
mm
5 e Unit eccentricity at the base
b,limit
6 Initial eccentricity at the base mm
e
b,0
e
7 Eccentricity at the top mm
2
y
8 Yield strength N/mm
2
9 y Actual yield strength N/mm
act
2
10 Nominal yield strength N/mm
y
nom
11 l Actual extension length of the prop m
12 l Length of a prop at maximum extension m
max
13 Overlapping length mm
l
0
14 Plastic moment resistance of the cross section
M kN⋅ m
p1
15 M Reduced plastic moment resistance of the cross section kN⋅ m
p1,N
16 N Normal (axial) force kN
17 Ideal buckling force kN
N
C,i
18 Plastic compression resistance of the cross section kN
N
p l
19 Nominal plastic compression resistance of the cross kN
N
pl
section
20 Normal (axial) force of the tube kN
N
t
kN
21 R Strength of a prop
22 Bearing resistance of the tube kN
R
b,t
kN
23 R Shear resistance of the pin
p
24 Failure load of a test kN
R
u
25 Actual characteristic strength of the prop class y where y kN
R
y,act
corresponds to classes from A. to W
26 Nominal characteristic strength of the prop class y where kN
R
y,k
y corresponds to classes from A. to W
27 V Vertical load kN
28 α Angle of inclinanatio between the inner and outer tube rad
29 Partial safety factor for the resistance 1
γ
M
30 Splitted partial safety factors for the material 1
γ ,γ
M1 M2
31 Partial safety factor for the action 1
γ
F
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5 Classification
Adjustable telescopic aluminium props shall be classified according to its specified value for nominal
characteristic strength R , given in Table 1 (load classes) and its maximal extension length l given in
y,k
max
table 2 (length classes).
Table 1 — Load classes of adjustable telescopic aluminium props
load class Specified value for nominal characteristic strength R
y,k
A see clause 10
B see clause 10
see clause 10
C
D 34,0 kN
E 51,0 kN
R 68,0 kN
85,0 kN
S
102,0 kN
T
U 119,0 kN
V 136,0 kN
W 153,00 kN
Table 2 — Length classes of adjustable telescopic aluminium props
length class length at maximum extension l
max
10 1,00 m ≤ l ≤ 1,49 m
max
15 1,50 m ≤ ≤ 1,99 m
l
max
20 2,00 m ≤ l ≤ 2,49 m
max
25 2,50 m ≤ l ≤ 2,99 m
max
30 3,00 m ≤ ≤ 3,49 m
l
max
35 3,50 m ≤ ≤3,99 m
l
max
40 4,00 m ≤ ≤ 4,49 m
l
max
45 4,50 m ≤ ≤ 4,99 m
l
max
50 5,00 m ≤ ≤ 5,49 m
l
max
55 5,50 m ≤ l ≤ 5,99 m
max
60 6,00 m ≤ l ≤ 6,49 m
max
65 6,50 m ≤ ≤ 6,99 m
l
max
70 7,00 m ≤ l ≤ 7,49 m
max
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6 Designations
Example: EN xxx R65/49 SQ T2 C3 3 M
Designation of a prop in accordance with EN XXX, class: "R 65", with a minimum extended length: "49" dm,
"SQ" with square endplates, “T2” type 2 with threaded inner tube, “C3” hot-dip galvanized corrosion protection
for steel , “3” suitable for attaching couplers in accordance with EN 74-1 and EN 74-2 couplers with steel
tubes in accordance with EN 39 with nominal wall thickness greater than 3mm, “M” with an ongoing
production inspection level M.
Prop EN XXX R65/49 SQ T2 C3 3 M
Description block
European Standard number block
Load Class, length Class ,minimum extended length
Square Endplate (SQ) (possible designations: SQ,SR,SH,)
Prop Type 2 with threaded inner tube
Hot dip galvanized corrosion protection for steel tubes
Suitable for attaching EN 74 couplers with steel tubes in accordance with EN 39
with nominal wall thickness greater than 3mm
With an ongoing production inspection level
7 Materials
7.1 General
Materials shall have a good resistance to, and/or be protected against atmospheric corrosion and shall be free
of any impurities and defects which might affect their satisfactory use. Steels of deoxidation type FU (rimming
steels) are not permitted.
Materials should be selected from the relevant existing European and International Standards and, whenever
applicable, should be in accordance with the following standards:
EN 12811:1 for steel and EN 12811:2 ( in particular clause 6 ) and EN 1999-1:1998 for aluminium
7.2 Corrosion protection for steel
Steel elements shall be protected against atmospheric corrosion in general in accordance with EN 12811-2.
Electrolitycal zinc coating C with an average thickness of 15 µ conforms to 8.1 of EN 12811-2:2004.
z
For pin and attachment it shall be shown that they achieve at least equivalent protection.
10
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8 Requirements
8.1 Tubes
The cross-sections of the steel tubes should be selected from the relevant existing European or International
standards and, whenever applicable, shall be in accordance with one the following standards:
EN 10210-1, EN 10210-2, EN 10219-1, EN 10219-2, EN 39, ISO 2937, ISO 418, ISO 424, ISO 3629
For class A,B, C ,D and E steel tubes the nominal wall thickness shall be in accordance with EN 1065.
For classes from R to W steel tubes minimum nominal wall thickness shall be 2.6
For the purposes of assessment, the method of making holes shall be stated on the drawings.
NOTE The preferred method of forming holes is by drilling.
For aluminium profiled tubes minimum nominal wall thickness shall be 2 mm.
For aluminium tubes the minimum nominal wall thickness shall be 4,0 mm.
For tubes for which it shall be possible to attach EN 74- 1 and EN 74-2 couplers, the minimum nominal wall
thickness shall be 2.9 mm for steel and 4.0 mm for aluminium.
8.2 Welding
For steel elements or for aluminium elements the welding shall be carried out in accordance to execution
class 2 (EXC 2) of EN 1090-2:2005 resp. EN 1090-3:2008.
8.3 Length adjustment device
A prop shall be provided with a length adjustment device to modify the length from the minimum to the
maximum extension.
The adjustment device shall be of two types:
1) a pin inserted into hole in the inner tube and a threaded collar connected to the thread in the outer
tube (length changes by step) (type 1) (see Figure 1),
2) a threaded collar connected to the outer tube with a threaded inner tube (length changes
continuously); (type 2) (see Figure 2)
The length adjustment device shall be verified in accordance with Table 3.
8.4 Permanent prevention against unintentional disengagement
The inner and outer parts of a prop shall be prevented permanently from being separated except by
intentional action. One of the following methods shall by applied:
safety method 1: Permanent locking connection (see example of Figure 3a));
safety method 2: Permanent locking connection and an additional safety device (see example of
Figure 3b));
safety method 3:Two independent safety devices arranged on the circumference not opposed each other
(See Figure 3c));
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safety method 4: A safety device locked by an additional permanent safety device (See example of
Figure 3d)).
The additional permanent safety device shall be so designed that the safety device can only be detached or
attached by at least two consecutive deliberate manual actions.
Figure 3 — Examples of methods of locking safety devices
8.5 Anti hand trap
For prop type 1 when the prop is fully closed without the pin inserted. There shall remain at least 100 mm
clearance between the endmost part of the outer tube or the cellar nut in the case of a covered thread and the
inside of the endplate.
8.6 Overlapping length
There shall be an overlapping length between the outer and inner tube, l , of at least 300 mm when the prop is
0
fully open.
12
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9 Endplates
Props endplates of classes A,B,C, D and E shall be in accordance with 7.5 of EN 1065:1998. For classes
R,S,T,U, V and W endplates shall be square (SQ), rectangular (SR) or shaped (SH).
Endplates shall have at least two holes for connection purposes. If a central hole is required in the endplates it
shall have a minimum diameter of 28 mm.
2
Plain aluminium endplates shall be made of a material having a minimum proof stress of 195 N/mm and shall
have a minimum nominal thickness of 10 mm.
For plain steel endplates see 7.5.2 of EN 1065:1998.
Profiled endplates shall have a spring stiffness and a bending resistance at least equal to that of plain
endplates.
It shall be possible to draw an inscribed circle on endplates of 120 mm diameter. For class A It shall be
possible to draw an inscribed circle on endplates of 110 mm.
At corners which would otherwise be sharp the radius shall be 5 mm ≤ r ≤ 10 mm.
10 Nominal characteristic strength
According to the class and to the length at maximum extension a prop shall have the nominal characteristic
strength calculated in accordance with the following values (see Table 1):
l
max
R = 51,0⋅ ≤ 44,0 kN
A,k
2
l
l
max
R = 68,0⋅ ≤ 51,0 kN
B,k
2
l
l
max
R = 102,0⋅ ≤ 59,5 kN
C,k
2
l
R = 34,0 kN
D,k
R = 51,0 kN
E,k
R = 68,0 kN
R,k
R = 85,0 kN
S,k
R = 102,0 kN
T,k
R = 119,0 kN
U,k
R = 136,0 kN
V,k
R = 153,0 kN
W,k
Where
R is the nominal characteristic strength for the prop class y in kN
y,k
l is the length at the maximum extension in metres
max
l is the actual extension length in metres
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11 Documentation of test results
11.1 General
The actual characteristic strength R of a prop shall be verified following the steps in Table 3 .
y act
The actual characteristic strength R of a prop shall be verified both with the outer tube at the bottom and
y act
with the inner tube at the bottom.
The actual characteristic strength of a prop, R shall be verified at maximum extension, for the classes A,
y act
B or C in the fully closed extension and the most unfavourable extension in between also. The most
unfavourable extension is the length with the smallest quotient R , / R .
y act y,k
For all extended lengths. the actual characteristic strength R of a prop shall be at least equal to the
y act
nominal characteristic strength in accordance with one of the equations written in chapter 10 of this standard.
Table 3 — Verification steps
Step Property Verification method
1 Actual characteristic strength R Determined by calculation supported by
y act
detail tests in accordance to 11.2 and
confirmed by tests in accordance with 11.3
2 Length adjustment device Determined by calculation and/or tests in
accordance with 11.4
3 Unintentional disengagement Tests in accordance with 12.3
11.2 Verification of the actual characteristic strength by calculation
11.2.1 General
Calculations shall be carried out in accordance with EN 1065:1998 and for steel components with EN 1993-1-
1:2005, Eurocode 3, and for aluminium components with ENV 1999-1-1:1998, Eurocode 9, in cases where
this European Standard gives no requirements.
The global analysis to determine the internal forces and moments shall use elastic analysis design principles
assuming that the behaviour of the material is linear at all stress levels. The resistances of cross sections may
be calculated by using plastic stress distributions. For the global analysis, the second order theory shall be
used, taking into account the influence of the deformations of the structure on the internal forces and
moments.
The values for resistance in compression, bending moment, stiffness and eccentricities at the base shall be
defined or calculated or determined by tests in accordance with 12.2 to support the analysis model chosen.
11.2.2 Static system
Characteristic strength calculations shall be carrie
...
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