Tier 15 BABA Vaults – Tier 15 BABA Polymer Concrete Vaults – BABA Tier 15 Vaults – BABA Compliant Tier 15 Handholes- Tier 15 BABA Handholes- Tier 15 BABA Telecommunications Vaults – Tier 15 BABA Telecom Vaults – BABA Telecom Tier 15 Handholes – AASHTO Underground Vaults – AASHTO Handholes – DOT Junction Box

Call (866) 650-3282 for our Tier 15 Vaults

Heavy-Duty Tier 15 Vaults for Superior Underground Infrastructure Protection

Tier 15 vaults are engineered for the most demanding underground applications, providing exceptional strength, reliability, and protection for critical utilities. Designed to meet or exceed Tier 15 load ratings, these heavy-duty enclosures are ideal for areas subjected to high traffic loads, including roadways, sidewalks, airports, and commercial or industrial zones. Whether you’re managing fiber optic networks, electrical systems, or water utilities, Tier 15 utility vaults offer unmatched durability and performance.

Manufactured from high-strength materials such as polymer concrete, fiberglass-reinforced polymer (FRP), or HDPE, Tier 15-rated vaults are built to withstand up to 100,000 lbs or more of vertical load. They provide secure, tamper-resistant access to underground infrastructure, making them an ideal choice for telecom, electric, gas, and water utility providers. Many models feature anti-slip covers, gasketed seals, corrosion-resistant hardware, and customizable options including logo engraving and multiple knockouts for conduit entry.

For projects requiring BABA (Build America, Buy America) compliance or Made in USA assurance, many Tier 15 vaults are domestically manufactured to meet federal funding requirements. These vaults also support rapid installation with lightweight designs compared to traditional concrete alternatives, significantly reducing labor and equipment costs.

Popular Applications for Tier 15 Vaults Include:

• Telecommunications (FTTX, 5G backhaul)

• Power distribution and switchgear

• Municipal infrastructure and street lighting

• Traffic signal control systems

• Water meter and valve access

Load Ratings for Vaults

• AASHTO (American Association of State Highway and Transportation Officials): This organization develops standards for highway and bridge design, including load ratings.

• H-20 and HS-20: These are specific load ratings used to determine the structural capacity of various components, including vault lids and other structures that may be subjected to vehicular traffic.

• ANSI/SCTE 77 is a performance specification to ensure the structural integrity of underground enclosures, and was updated in 2017

• Tier Ratings: ANSI/SCTE 77 uses a tier system to classify load ratings for underground enclosures, with Tier 5, Tier 8, Tier 15 and Tier 22 being the most common

• Tier 15: Driveway, parking lot, and off-roadway applications subject to occasional non-deliberate heavy vehicular traffic (standard passenger vehicles)

• Tier 22: Driveway, parking lot, and off-roadway applications subject to occasional non-deliberate heavy vehicular traffic (Trucks and larger vehicles)

• AASHTO H-20 (deliberate traffic, different specifications): deliberate vehicular traffic applications

• ASTM C857 and ASTM C858 are also used to design underground precast concrete utility structures

• ASTM C150 and ASTM C33 are used for cement and concrete aggregates

Loading Requirements

Pedestrian-rated	Vertical	Test Load	13.3kN	3,000 Lbs
					Tier 8	Vertical	DesignLoad	35.6kN	8,000Lbs
TestLoad	53.4kN	12,000 Lbs
Lateral	DesignLoad	28.7kN	600Lbs/sq. ft
	TestLoad	43.1 kN	900Lbs/sq. ft
Tier 15	Vertical	DesignLoad	66.7kN	15,000Lbs
		TestLoad	100.1 kN	22,500 Lbs
	Lateral	DesignLoad	38.3kN	800Lbs/sq. ft
		TestLoad	57.5 kN	1,200 Lbs/sq. ft
Tier 22	Vertical	DesignLoad	100.1kN	22,500Lbs
		TestLoad	150.1 kN	33,750 Lbs
	Lateral	DesignLoad	38.3kN	2,400Lbs/sq. ft
		TestLoad	57.5kN	3,600 Lbs/sq. ft
AASHTO H-20	Certified precastconcrete, cast iron, or AASHTO recognized material

Please call (866) 650 3282 or email team@americanteledata.com