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Enclosures & Underground

Polymer Concrete Enclosures

Polymer concrete enclosures are the heavy-duty standard for below-grade infrastructure protection. Made from select-grade aggregates bonded with polymer resin and reinforced with fiberglass, these boxes deliver exceptional compressive strength and long-term durability in high-traffic environments. When the specification calls for maximum structural performance — road crossings, parking lots, industrial yards — polymer concrete is the proven choice.

Galloway stocks polymer concrete enclosures from Hubbell Quazite and Oldcastle Infrastructure. The Quazite line offers the broadest size range in the industry from compact 6”×8” grade-level boxes up to 48”×96” full-size vaults with multiple body styles, tier ratings, and UL listing across most configurations. Quazite boxes are manufactured in Lenoir City, Tennessee.

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Oldcastle Polymer Concrete

Oldcastle also manufactures a polymer concrete enclosure line as a complement to their Dura-lite composite offerings. The polymer concrete option is the right choice when specifications require maximum compressive strength or when the installation environment involves heavy sustained loading.

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Oldcastle Polymer Concrete 3048 Body Weights (Manufacturer Data)

Nominal Size Depth Body Weight Tier Rating
30” × 48” 18” 179 lbs Tier 22
30” × 48” 24” 223 lbs Tier 22
30” × 48” 36” 307 lbs Tier 22

Source: oldcastleinfrastructure.com Polymer 3048 spec sheet (2018)

 

Hubbell Quazite

Quazite polymer concrete enclosures are available in multiple body styles designated by two-letter prefixes: PG (straight wall, general purpose), PC (stackable), PD and PT (flared wall), and PX (extended depth). The PG style is the most commonly specified for telecom and broadband applications. All standard sizes are available in Tier 8, Tier 15, or Tier 22 ratings, with UL listing to ANSI/SCTE 77 (2017 edition) on most configurations. The Quazite system includes the EZ Auger™ self-cleaning bolt system for cover attachment, pre-molded mouseholes for conduit entry, and optional gasketing for moisture-sensitive installations. Box Armor™ polymer concrete lids are available as an upgrade for applications requiring enhanced cover durability.

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Hubbell Quazite PG-Style Specifications (Manufacturer Data)

Part Number Nominal Size Depth Box Weight Tier UL Listed
PG1324BA12 13” × 24” 12” 53.55 lbs Tier 22 Yes — ANSI/SCTE 77
PG1730BA24 17” × 30” 24” 116.55 lbs Tier 22 Yes — ANSI/SCTE 77
PG2424BA24 24” × 24” 24” 173.25 lbs Tier 22 Yes — ANSI/SCTE 77
PG2436BA24 24” × 36” 24” 180.6 lbs Tier 22 Yes — ANSI/SCTE 77
PG3048BA36 30” × 48” 36” 376.95 lbs Tier 22 Yes — ANSI/SCTE 77
Source: hubbellcdn.com Quazite individual spec sheets (2026); 2019 Quazite Product Catalog. Weights are box only (no cover). Tier 22 = 22,000 lbf design / 33,750 lbf test.

Full Size Range: The complete Quazite catalog includes sizes from 6”×8” through 48”×96” with depths from 6” to 72”. Available in PG (straight wall), PC (stackable), PD (flared), PT (flared), and PX (extended depth) body styles. Tier 8, 15, and 22 ratings across most sizes. Contact Galloway for specific size/style/tier combinations.

Composite vs Polymer Concrete: When To Use Which

Factor Composite (HDPE) Polymer Concrete
Weight Significantly lighter—hand-settable in most sizes Heavy—larger sizes require mechanical placement
Strength Tier 15 and Tier 22 available (cover-dependent) Tier 8, 15, and 22. Higher compressive strength overall
UL Listing Varies by manufacturer and model UL Listed to ANSI/SCTE 77 on most Quazite configs
Best For High-volume FTTH builds, weight-sensitive installs, no crane access Road crossings, spec-driven projects, UL-required, max load
Size Range 12”×12” to 48”×60” (Channell BULK) 6”×8” to 48”×96” (Quazite full catalog)

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Need Polymer Concrete Enclosures?

Galloway stocks Hubbell Quazite and Oldcastle polymer concrete enclosures at regional locations across the US. Whether you have defined specifications or need assistance selecting the right size, depth, tier rating, and cover type for your installation, our team can help ensure the right product is specified and delivered.

When you work with Galloway, you get a team that understands your business and answers your call. We have your back.

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Fort Myers, FL
(239) 481-7448
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(813) 443-5598
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(786) 378-4615
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(302)-317-1502
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(614) 414-0861
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(317) 947-6271
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(720) 683-6100
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(623) 738-2800
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(430) 341-0010
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(757) 263-0159