ASTM E3202-24
Standard Practice for Specimen Preparation and Mounting of Plastic Composites for Use as Deck Boards, Stair Treads, Guards or Handrails to Assess Surface Burning Characteristics

Standard No.

ASTM E3202-24

Release Date

2024

Published By

American Society for Testing and Materials (ASTM)  US  /  ASTM

Latest

ASTM E3202-24

Introduction

Analysis of the Standard's Core Content

ASTM E3202-24 specifies the preparation and installation of specimens used to evaluate the surface burning characteristics of plastic composite materials, primarily for architectural applications such as decks, stair treads, and guardrails. The standard was last revised in 2024, with a focus on updating the testing requirements for non-self-supporting specimens.

---

Technical parameter requirements

Parameter category	Self-supporting material	Non-self-supporting material
Specimen size	24.5±0.5 feet (length) × 20-24 inches (width)	Same as left, additional support structure required
Test standard	ASTM E84 Surface Burning Characteristics Test Method
Key indicators	Flame spread index (FSI), smoke development index (SDI)

---

Key Points for Standard Implementation

Typical Application Case: When obtaining UL certification, a manufacturer of wood-plastic composite guardrails used the E2579 specification to install self-supporting specimens in accordance with Section 6.3 of this standard. The test results showed an FSI ≤ 25, meeting Class A fire protection requirements.

Technical Evolution: Compared to the 2019 version, the 2024 version adds a clear definition of severe sagging in the testing of non-self-supporting materials (Clause 3.2.3), requiring that specimen deformation during testing must not affect the flame propagation path.

---

Safety Operation Specifications

Chapter 8 of the standard emphasizes that testers must comply with the fire safety regulations of ASTM E84, including but not limited to:

• The test site is equipped with Class II fire extinguishing equipment
• Maintain a minimum ventilation system air change rate of 15 times/hour
• It is prohibited to operate the combustion test equipment alone

---

Relationship with other standards

This standard should be used in conjunction with the following specifications:

1. ASTM E84: Core Test Method
2. ASTM E2579: Self-supporting Specimen Installation Details
3. IEEE/ASTM SI-10: Unit Conversion Basis

---

Implementation Recommendations

1. Specimen representativeness: Plastic composite materials with the same formulation, thickness, and production process as those used in the actual project should be used. 2. Pre-test verification: It is recommended to conduct a small-scale combustion test to evaluate the material's deformation characteristics at high temperatures. 3. Data recording: Detailed records of specimen installation (including a schematic diagram of the support structure) and test environment parameters must be kept.

ASTM E3202-24 Referenced Document

• ASTM D883 Standard Terminology Relating to Plastics*， 2025-11-20 Update
• ASTM E176 Standard Terminology of Fire Standards
• ASTM E2579 Standard Practice for Specimen Preparation and Mounting of Wood Products to Assess Surface Burning Characteristics
• ASTM E84 Standard Test Method for Surface Burning Characteristics of Building Materials

ASTM E3202-24 history

• 2024 ASTM E3202-24 Standard Practice for Specimen Preparation and Mounting of Plastic Composites for Use as Deck Boards, Stair Treads, Guards or Handrails to Assess Surface Burning Characteristics
• 2019 ASTM E3202-19e1 Standard Practice for Specimen Preparation and Mounting of Plastic Composites for Use as Deck Boards, Stair Treads, Guards or Handrails to Assess Surface Burning Characteristics
• 2019 ASTM E3202-19 Standard Practice for Specimen Preparation and Mounting of Plastic Composites for Use as Deck Boards, Stair Treads, Guards or Handrails to Assess Surface Burning Characteristics

Standard and Specification