ISO 12858-2:2020

INTERNATIONAL ISO
STANDARD 12858-2
Second edition
2020-06
Optics and optical instruments —
Ancillary devices for geodetic
instruments —
Part 2:
Tripods
Optique et instruments d'optique — Équipements annexes pour les
instruments géodésiques —
Partie 2: Trépieds
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design . 1
5 General features — Dimensions . 1
6 Requirements . 3
6.1 Tripod head . 3
6.2 Joints . 3
6.3 Clamping screw . 3
6.4 Tripod legs . 3
6.5 Tripod shoes . 3
6.6 Torsional rigidity . 7
6.7 Height stability under load . 7
6.8 Material . 7
6.9 Protection from corrosion . 7
7 Tools . 7
8 Designation and marking . 7
Annex A (informative) Parallel screw threads of Whitworth form . 9
Bibliography .10
Foreword
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee
SC 6, Geodetic and surveying instruments.
This second edition cancels and replaces the first edition (ISO 12858-2:1999), which has been
technically revised. It also incorporates the Amendment ISO 12858-2:1999/Amd.1:2013. The changes
compared to the previous edition are as follows:
— editorial corrections.
A list of all parts in the ISO 12858 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

Introduction
ISO 12858 consists of a series of parts which detail specifications for ancillary devices to be used with
geodetic instruments in surveying. This second part specifies requirements for tripods.
Additional parts, covering further ancillary devices, may be added to ISO 12858 as the need arises.
INTERNATIONAL STANDARD ISO 12858-2:2020(E)
Optics and optical instrument
...