1.1
This practice covers elements related to laminated glass when exposed to hydrostatic loads such as in the construction of swimming pools and aquariums. This practice includes laminated glass performance, and safe behavior considerations. It addresses the characteristics unique to glass and laminated glass.
1.2
This practice does not address applications constructed with monolithic glass, glass block, insulating glass units, glass tiles that are directly bonded to a non-glass structural substrate, acrylic, or other plastics.
1.3
The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance of this practice.
1.4
This practice is not meant to address consumer products such as portable aquariums. This practice is meant for fixed or temporary pools or aquariums at a specific location.
1.5
This practice does not address dynamic flood loads or impact loads such as wave action, floating debris, or human and animal collisions.
1.6
This practice does not address issues concerning corrosion and or surface degradation effects of glass.
1.7
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.8
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
====== Significance And Use ======
4.1
Glass is a brittle material with different time dependent properties than other building materials used in the construction of pools. Therefore, the properties of glass are important considerations in the design and construction of glass pools and aquariums.
4.2
Post-breakage glass retention and strength shall be considered in the design of a glass pool or aquarium as a means of maintaining the integrity of the system, deterring cutting/piercing injuries, or fall-through or fallout of the glass.
4.3
The structural design shall be confirmed by calculations by a design professional in accordance with Section
6
.
4.4
If testing is required (see
4.4.1 –
4.4.3
) to verify post-breakage behavior of the glass, the testing shall be in accordance with Section
7
.
4.4.1
For laminates with two glass plies, verification testing is required.
4.4.2
For laminates with more than two glass plies, verification testing is not required if calculations completed in accordance with
4.3
demonstrate that the glass assembly has sufficient strength to sustain the full design load with any one glass ply broken.
4.4.3
When verifying post-breakage behavior by calculation, allowable glass stress for permanent load duration in accordance with
Table 1
shall be used for all load cases greater than 1 month.
4.5
The manufacturer of glass pools and aquarium systems shall provide installation directions and fabrication and installation tolerances of their systems.
4.6
Structural Support System—Deflection:
4.6.1
The glass and support system shall be sufficiently stiff to limit the deflection of the supported glass under the design load to no more than L/240 or 13 mm [0.5 in.] whichever is less, where L is the longest unsupported span for three or fewer side supported systems, or the longest supported length for four side supported systems.