1、SURFACE VEHICLERECOMMENDED PRACTICEJ1948 DEC2014Issued 1989-03Revised 2014-12Superseding J1948 MAR2003Cab Sleeper Occupant Restraint System TestRATIONALEClarified scope of this recommended practice to section (h) of FMCSR 393.76.1. SCOPEThis SAE Recommended Practice provides a standardized test proc
2、edure for heavy-duty truck sleeper berth restraints to determine whether they meet the FMCSR 393.76(h) requirements.1.1 PurposeThis document was developed to determine if a truck sleeper berth restraint is adequate to sustain a predetermined maximum horizontal load such as required by FMCSR regulati
3、on 393.76(h).2. REFERENCES2.1 Applicable DocumentThe following publication forms a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply.2.1.1 FMCSR PublicationAvailable from the Federal Motor Carrier Safety Administra
4、tion, www.fmcsa.dot.gov.FMCSR 393.76 Sleeper Berths3. DEFINITIONThe restraint system is the apparatus or structure designed to prevent ejection of an occupant from the sleeper berth during sudden vehicle deceleration. The system may be removable to allow entrance and egress to the berth._SAE Technic
5、al Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the
6、sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2014 SAE InternationalAll rights reserved. No part of this publication may b
7、e reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE.TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)Tel: +1 724-776-4970 (outside USA)Fax
8、: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/J1948_201412SAE INTERNATIONAL J1948 Revised DEC2014 Page 2 of 34. FACILITIES - APPARATUS AND MATERIALS4.1
9、 Test Materials4.1.1 The modular vehicle component, or enclosure, containing the sleeper berth.4.1.2 The occupant restraint system, including all necessary hardware.4.2 Test Equipment4.2.1 A means for fastening the enclosure securely to the ground plane in its normal operating position.4.2.2 A body
10、block consisting of a curved plate or cylinder of overall length sufficient to engage the active portions of the restraint system. The plate should be curved with edge radii as shown in Figure 1. If a cylinder is used, it should be 305 mm (12 in) in diameter or larger.FIGURE 1 - END VIEW BODY BLOCK4
11、.2.3 A means of locating one or more fastening devices.4.2.4 A horizontal loading device with minimum capacity of 26688 N (6000 lb).4.2.5 A means for measuring and recording the load in this device.5. PROCEDURE5.1 Load Test5.1.1 Locate and fasten sleeper berth enclosure in its normal position relati
12、ve to the ground plane.5.1.2 Locate and fasten restraint system.5.1.3 Locate body block against occupant side of restraint system in any axis at any location designated as the restraint area.5.1.4 Fasten body block to loading device.5.1.5 Check and calibrate instrumentation.5.1.6 Apply a force of 26
13、688 N (6000lb) horizontally 0 to +15 degrees in a forward direction at a maximum rate of 1334 N/s (300 lb/s).5.1.7 Hold 26688 N (6000 lb) for 10 s.5.1.8 Observe performance.SAE INTERNATIONAL J1948 Revised DEC2014 Page 3 of 36. NOTES6.1 Marginal IndiciaA change bar (l) located in the left margin is f
14、or the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only.PREPARED BY THE SAE TRUCK CRASHWORTHINESS COMMITTEE OF THE SAE TRUCK AND BUS BODY AND OCCUPANT ENVIRONMENT STEERING COMMITTEE
