ISO 14953:2024

FINAL DRAFT
International
Standard
ISO/FDIS 14953
ISO/TC 20/SC 14
Space systems — Structural design
Secretariat: ANSI
— Determination of loading levels
Voting begins on:
for static qualification testing of
2023-12-28
launch vehicles
Voting terminates on:
2024-02-22
Systèmes spatiaux — Conception des structures — Détermination
des niveaux de chargement pour un essai statique de qualification
des véhicules lanceurs
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 SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 14953:2023(en) © ISO 2023

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FINAL DRAFT
ISO/FDIS 14953:2023(en)
International
Standard
ISO/FDIS 14953
ISO/TC 20/SC 14
Space systems — Structural design
Secretariat: ANSI
— Determination of loading levels
Voting begins on:
for static qualification testing of
launch vehicles
Voting terminates on:
Systèmes spatiaux — Conception des structures — Détermination
des niveaux de chargement pour un essai statique de qualification
des véhicules lanceurs
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
COPYRIGHT PROTECTED DOCUMENT
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2023
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 14953:2023(en) © ISO 2023

© ISO 2023 – All rights reserved
ii

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ISO/FDIS 14953:2023(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design of loading levels . 2
4.1 General .2
4.2 Calculation of qualification test loading .2
4.3 Corrected safety factor .2
4.4 Correction factors .3
4.4.1 Correction factor for thickness, K .3
min
4.4.2 Correction factor for adjacent structures, K .
...

2023-11-27
ISO/FDIS 14953:2023(E)
ISO/TC 20/SC 14
Secretariat: ANSI/AIAA
Date: 2023-12-13
Space systems — Structural design — Determination of loading
levels for static qualification testing of launch vehicles
Systèmes spatiaux — Conception des structures — Détermination des niveaux de chargement pour un
essai statique de qualification des véhicules lanceurs
FDIS stage

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ISO/FDIS 14953:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this
publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical,
including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can
be requested from either ISO at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Fax: +41 22 749 09 47
EmailE-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2023 – All rights reserved
© ISO 2023 – All rights reserved

ii

---------------------- Page: 2 ----------------------
ISO/FDIS 14953:2023(E)
Contents Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design of loading levels . 3
4.1 General . 3
4.2 Calculation of qualification test loading . 3
4.3 Corrected safety factor . 3
4.4 Correction factors . 4
4.4.1 Correction factor for thickness, K . 4
min
4.4.2 Correction factor for adjacent structures, K . 4
adj
4.4.3 Correction factor for thermal gradients, 𝐾𝐾T . 4
4.4.4 Correction factor for temperature, 𝐾𝐾𝐾𝐾 . 4
4.4.5 Correction factor for dispersions, 𝐾𝐾𝐾𝐾 . 5
4.4.6 Correction factor for geometric imperfections, 𝐾𝐾imp . 5
4.5 Comparison of results . 6
4.6 Implementation of this document . 6
Bibliography . 7

© ISO 2023 – All rights reserved

iii
© ISO 2023 – All rights reserved iii

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ISO/FDIS 14953:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on
...