PIA TS 135  3.  MATERIALS AND WORKMANSHIP :  4.  DETAIL REQUIREMENTS 4.1  DESIGN AND CONSTRUCTION:  4.1.1  MATERIALS: 4.1.2  STITCHING: 4.1.3  MAIN PARACHUTE ASSEMBLY: Materials and workmanship shall be of a quality that documented experience and/or tests have  conclusively demonstrated to be suitable for the manufacture of, and appropriate for the intended  use in, personnel parachute assemblies. All materials shall remain functional for storage from -40 to +200  F (-40 to +93.3   C), and from 0 to 100% relative humidity. All plated ferrous parts  shall be treated to minimize hydrogen embrittlement. All materials shall be designed to support the proof loads specified in the applicable  specification, drawing, or standard, without failure. In the absence of an applicable specification,  drawing, or standard for a particular material, successful completion of the qualification tests  listed under section 4.3 shall be considered adequate evidence of suitability.  Stitching shall generally be of a type that will not ravel when broken. Note that this is not  required for consumable or frangible parts.  When installed but not deployed, the main parachute assembly shall not interfere with the proper  function of the reserve parachute assembly. Ref: Table 2  The primary actuation device/ripcord, including all joints, shall withstand the test loads of 4.3.2  without failure. The primary actuation device/ripcord shall meet the human-factors requirements  of 4.3.3., if applicable. The reserve static line, if used, including all joints shall withstand the test loads of 4.3.2 without  failure and shall meet the functional requirements of 4.3.8.2.  The harness shall be so constructed that, after landing, the parachutist can separate himself  from the main and reserve canopies and/or harness assembly unaided. On a dual harness,  reserve parachute assembly, the parachutist in command must be able to separate himself and  the second parachutist from the reserve canopy and/or harness assemblies unaided.  For reserve or emergency parachute assemblies, incorporating a drogue, the drogue release  shall be tested at an equivalent force to the drag force generated at the MOW and MPOS.  The human release force shall not be less than 5 lbf (22.2N) and must not exceed 22 lbf (97.9N). The release shall meet the human-factors requirements of 4.3.3.  The stowage container shall be provided with a parachute data card pocket constructed such  that the card will not be easily lost and will be readily accessible, when the parachute is packed  in the container. 4.1.4   PRIMARY ACTUATION DEVICE/RIPCORD: 4.1.5   RESERVE STATIC LINE (RSL): 4.1.6   HARNESS RELEASE: 4.1.7   DROGUE PARACHUTE ASSEMBLY & RELEASE: 4.1.8   DATA CARD POCKET; STOWAGE CONTAINER: DISTRIBUTION STATEMENT: All Rights Reserved. No Part of this publication may be reproduced without prior written permission from Parachute Industry Association. PIA Headquarters, Parachute Certification St andards Committee, 3833 West Oakton Street, Skokie, IL 60076 Phone: 847-674-9742 Fax: 847-674-9743 or  website www.pia.com for contact details.  Disclaimer: This document is published by the PIA to provide technical and engineering standards that can be used by reference by all those who may benefit from them. The use of this document is entirely voluntary, and its applicability and suitability for any particular use, including any patent or trademark infringement  arising there from, is the sole responsibility of the user. There may be errors, especially in numbers. PIA disclaims any responsibility for accuracy. The PIA reviews each technical publication periodically, at which time it may be reaffirmed, revised, or canceled. The PIA invites your written comments and suggestions.  Copyright © 2010 Parachute Industry Association.  PIA TS-135, Revision 1.4, Issued April 22, 2010, Page 5 of 18  Change 1 (December 2015)  A-30