BS ISO 3739-2-2021 pdf free download – Industrial tyres and rims Part 2: Pneumatic tyres (metric series) on 5 degrees tapered or flat base rims — Load ratings.
This document specifies the load ratings of the metric series of pneumatic tyres primarily intended forindustrial vehicles for use on prepared surfaces.
ISO 3739-1 deals with designation, dimensions and marking; ISO 3739-3 deals with rim contours forthese tyres.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies.Forundated references, the latest edition of the referenced document(including any amendments) applies.IS0 3739-1, Industrial tyres and rims – Part 1:Pneumatic tyres (metric series) on 5 degrees tapered or flatbase rims – Designation, dimensions and marking
ISO 4223-1, Definitions of some terms used in the tyre industry —Part 1: Pneumatic tyresISO 5053-1, Industrial trucks — Vocabulary —Part 1: Types of industrial trucks
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO4223-1 and ISO 5053-1 apply.ISO and lEC maintain terminological databases for use in standardization at the following addresses:- ISO online browsing platform: available at https://www.iso.org/obp
一IEC Electropedia: available at http://www.electropedia.org/
4 Reference load-carrying capacity
The 100 % reference load-carrying capacity is the load corresponding to the load index markedon the tyre. The correlation between load index and tyre load-carrying capacity shall conformto ISo 3739-1.
Reference load-carrying capacities of several versions of the same tyre size (same dimensional andconstructional characteristics) shall be based on reference inflation pressures of 550 kPa,675 kPa,825 kPa and 1 000 kPa.
5.3 Calculated load
Calculated loads from Tables 1,2,3, and 4 shall be rounded to nearest 5 kg
5.4Dual tyre load
When fitted in dual formation, the load for the two tyres is twice that for a single tyre.
6 Inflation pressures
Operating cold inflation pressures should be agreed between tyre and vehicle manufacturers takinginto account not only the tyre load-carrying capacity, but also the operating conditions, the maximumspeed, the position of the tyre on the vehicle,service conditions and the construction and characteristicsof the vehicle.
Cold inflation pressure means the pressure taken with the tyre at ambient temperature; it does notinclude any pressure build-up due to tyre usage.BS ISO 3739-2 pdf download.