A Comprehensive Guide to ASTM D5957-98: Standard Test Methods for Bending of Sheet Materials (Flexure Test)
Introduction
ASTM D5957-98 is a standard test method developed by the American Society for Testing and Materials (ASTM) that outlines the procedures for determining the bending properties of sheet materials, such as plastics, paper, and composites. This guide provides an overview of the test method, its significance, and a step-by-step approach to performing the flexure test.
Significance and Use
The flexure test is a widely used method to evaluate the bending properties of sheet materials. The test provides information on the material's stiffness, flexibility, and resistance to cracking or breaking under bending loads. The results of this test can be used to:
Test Method Overview
ASTM D5957-98 involves a three-point flexure test, where a sheet material specimen is subjected to a bending load using a universal testing machine (UTM). The test consists of:
Step-by-Step Test Procedure
Calculations and Reporting
Where to Find the ASTM D5957-98 PDF
You can obtain a copy of the ASTM D5957-98 standard from the following sources:
Conclusion
ASTM D5957-98 is a widely used standard test method for evaluating the bending properties of sheet materials. By following this guide, you can perform the flexure test and obtain valuable information on a material's stiffness, flexibility, and resistance to cracking or breaking under bending loads.
This blog post provides a comprehensive overview of ASTM D5957, the standard guide for flood testing horizontal waterproofing installations.
Understanding ASTM D5957: The Gold Standard for Flood Testing
When it comes to waterproofing horizontal surfaces—like plaza decks, green roofs, or parking structures—failure is not an option. ASTM D5957-98, titled the "Standard Guide for Flood Testing Horizontal Waterproofing Installations," is the industry-recognized methodology for ensuring these systems are watertight before they are covered by overburden.
While the "98" in the name refers to its 1998 designation, the standard has been reapproved as ASTM D5957-98(2021), confirming its continued relevance in modern construction. What is ASTM D5957?
ASTM D5957 provides a guided methodology for testing the water-resistance of waterproofing installations on horizontal surfaces with a slope no greater than 2% (20 mm/m or 1/4 inch per foot).
The goal is to provide a measure of confidence that the system will remain watertight for its intended service life by observing its performance under ponded water for a limited period. Key Requirements for a Successful Test
According to the Official ASTM D5957 Guide, several critical conditions must be met to ensure the test is valid:
System Completion: Both the waterproofing membrane and all flashings must be fully installed and cured. astm d595798 pdf free
Curing Time: Testing should never occur within the first 24 hours of installation. If ambient temperatures are below 10°C (50°F), the minimum wait time increases to 48 hours.
Structural Load: The additional weight of the water can affect the deflection of structural items. A structural engineer should often be consulted to ensure the deck can handle the weight.
Weather Constraints: Testing is not recommended if freezing temperatures are expected during the test period. The Flood Testing Process
The process involves creating temporary dams to contain water over the waterproofing membrane.
Preparation: Plug all drains and install temporary dams at the perimeter and around penetrations.
Filling: Water is typically ponded to a depth of 1 to 2 inches (25 to 50 mm) at the high point of the test area.
Observation: The water is held for a duration, commonly 24 hours, while the underside of the structural slab is monitored for signs of leakage or dampness.
Documentation: Specialized Water Intrusion Specialists often perform these tests to provide professional verification and detailed reporting. Accessing the Standard
ASTM standards are protected by copyright. While you may find summarized versions or older drafts on various educational repositories, the official and most up-to-date version is available for purchase directly from the ASTM International Store.
For professionals in the field, access is often provided through corporate subscriptions like ASTM Compass, which ensures you are always working with the current version.
The ASTM D5957-98 standard is a "Standard Guide for Flood Testing Horizontal Waterproofing Installations". While it is not typically available as a legal, free PDF download due to copyright, you can purchase the official document through ASTM International or the ANSI Webstore. Core Purpose of the Standard
ASTM D5957-98 outlines a method for testing the watertightness of waterproofing systems applied to horizontal surfaces, such as parking garages, plaza decks, and terraces. It is specifically for surfaces with a maximum slope of 20 mm/m (2%). Key Testing Procedures
The standard provides a structured methodology to ensure the integrity of a membrane before it is covered by a drainage layer or pavers.
Containment: The test area is subdivided using temporary containment assemblies, such as wood curbs or plastic barriers.
Flooding: Drains are temporarily blocked, and the area is flooded with a layer of water, typically up to 5 cm (2 inches) deep.
Duration: The water is generally held for a period of 24 to 48 hours while the underside of the structure is monitored for leaks.
Inspection: Before the test begins, the waterproofing membrane and flashings must be inspected and any existing deficiencies repaired. Critical Considerations
Structural Load: A licensed structural engineer should verify that the building can handle the weight of the ponded water before testing begins.
Temperature Restrictions: Testing is not recommended if freezing temperatures are expected, as ice can damage the waterproofing membrane.
Limitations: This standard is not intended for standard building roofing systems, long-term water storage facilities, or continuously submerged environments. Where to Find it Officially A Comprehensive Guide to ASTM D5957-98: Standard Test
If you need the full document for professional use, it is available on platforms like Intertek Inform or the official ASTM Compass portal. ASTM International - ANSI Webstore
Standards from ASTM are available both individually, directly through the ANSI webstore, and as part of a Standards Subscription. ANSI Webstore ASTM Compass
I can’t help find or provide copyrighted PDFs of standards like ASTM D5957-98, but I can create a concise guide summarizing the standard’s scope, key requirements, typical test setup, data reporting, and practical tips for implementation and troubleshooting. Which would you like: a short one-page summary, a detailed step-by-step procedure for lab use, or a checklist for quality-control audits?
ASTM D5957-98 is the Standard Guide for Flood Testing Horizontal Waterproofing Installations. It provides a standardized methodology for testing the watertightness of horizontal surfaces—such as plaza decks and parking garages—by ponding water over a cured waterproofing system. Key Features of ASTM D5957-98
D5957 Standard Guide for Flood Testing Horizontal Waterproofing Installations
The ASTM D5957-98 standard, known as the Standard Guide for Flood Testing Horizontal Waterproofing Installations
, is a critical benchmark for ensuring the watertightness of surfaces like plaza decks and parking garages. While the official document is a paid standard available through the ASTM International website
, you can find comprehensive summaries and procedural guides through technical partners and documentation platforms. Quick Guide to ASTM D5957-98
It applies to horizontal surfaces with a slope of no more than (1/4” per foot). Target Areas:
Primarily used for parking garages, plaza decks, and shower pans over habitable spaces. Important Exclusion: This standard explicitly states it is not intended for use on building roofing systems
, as the water weight can cause structural damage or irreversible membrane harm. The Flood Testing Procedure
A typical test following this standard involves the following steps: Preparation:
Inspect the membrane and flashings; repair any visible deficiencies and allow materials to cure fully (typically 24–48 hours). Containment:
Temporarily seal all drainage systems and install containment assemblies if only a portion of the area is being tested. Water Depth: Flood the area to a minimum depth of at the highest point, not exceeding at the lowest point. Maintain the water level for a minimum of Monitoring:
Check for leaks in the space below and monitor water loss at two or more locations using increments as small as 1/8”. ASTM International Where to Access Resources Official Standard: Purchase the most recent reapproved version directly from ASTM International or through distributors like Intertek Inform Procedural Summaries: Technical service providers like and manufacturers like
provide free PDF summaries and technical data sheets that outline the testing steps. Community Documents: Platforms like
often host user-uploaded versions or detailed field guides based on the standard. ASTM International equipment needed to set up a containment assembly for your next flood test?
The air on the parking garage's third floor was thick with the scent of fresh curing membrane and the anticipation of a storm that wasn't coming from the sky. Elias, the site inspector, clutched a worn clipboard. On it was a reference to ASTM D5957-98, the industry "bible" for flood testing horizontal waterproofing.
"You're sure the structure can handle it?" the foreman asked, eyeing the massive drains Elias had already begun to plug.
Elias nodded, pointing to the standard's guidelines. "Section 5.5 is clear," he said. "A licensed structural engineer had to sign off on the added live load before we even turned on the hose. We're looking at up to four inches of water—that’s a lot of weight". Test Method Overview ASTM D5957-98 involves a three-point
As the water began to pool over the plaza deck, Elias explained the stakes. They weren't just splashing around; they were creating a temporary pond to verify the watertightness of the new membrane before the heavy pavers were installed. According to the ASTM D5957-98 standard, the water had to sit for a minimum of 24 hours. "We wait," Elias said, "and we watch the ceiling below."
For the next day, they monitored "critical locations" for the slightest bead of moisture. By the 48-hour mark, the slab below remained bone-dry. Elias finally pulled the plugs. The "flood" receded, leaving behind a certified, watertight deck, proven by the very standard that ensures habitable spaces stay dry even when the world above is under water. Key Facts About ASTM D5957-98
D5957 Standard Guide for Flood Testing Horizontal Waterproofing Installations
If you cannot obtain ASTM D5957-98, consider these legally free or lower-cost alternatives:
| Standard | Focus | Cost | |----------|-------|------| | ASTM D5957-98(2017) | Updated reaffirmation (same technical content) | ~$60 (ASTM) | | ANSI/AAMA 501.2 | Flood testing of fenestration and curtain walls | Free for AAMA members | | ICC-ES AC79 | Acceptance criteria for below-grade waterproofing (free PDF via ICC) | Free | | BS 8102:2009 | UK standard for waterproofing (summary available) | ~£30 |
ASTM D5957-98 (reapproved 2017) is a critical standard guide for professionals in construction, waterproofing, roofing, and building inspection. Officially titled “Standard Guide for Flood Testing Horizontal Waterproofing Installations,” it provides procedures for evaluating the watertight integrity of horizontal surfaces such as:
Despite its age (originally approved in 1998), this guide remains widely referenced because the core methodology of flood testing has changed little, and later revisions (e.g., D5957-98(2017)) reaffirm its validity.
If you are an architect or engineer, here is a typical Division 7 specification language:
SECTION 07 19 00 – WATERPROOFING
3.5 FLOOD TESTING
A. Perform flood testing in accordance with ASTM D5957-98 (Reapproved 2017).
B. Test all horizontal waterproofing areas prior to placement of cover boards, pavers, or topping slabs.
C. Temporarily plug drains with non-corrosive, non-staining test plugs.
D. Flood each designated area with clean potable water to a minimum depth of 2 inches (50 mm) at the shallowest point.
E. Maintain water depth for minimum 24 hours, replenishing as needed.
F. Inspect underside of deck for leakage at 2-hour intervals during first 8 hours, then at 24 hours.
G. Any evidence of water penetration (drips, dampness, staining) constitutes failure.
H. Upon failure, Contractor shall drain area, allow membrane to dry, repair, and retest per same procedure at no additional cost.
I. Submit written test report with date, time, depth log, inspector’s name, photographs, and pass/fail determination.
Sites claiming “ASTM D5957-98 free PDF download” often deliver:
Downloading from such sites exposes you and your firm to legal liability (copyright infringement penalties up to $150,000 per work under U.S. law).