J N A BUILDERS INC

Learn more about what we do:

J N A Builders Inc. is a general engineering contractor specializing in mass transit facilities, heavy civil and commercial construction.

SELF PERFORM WORK:


J N A Builders Inc specializes in structural concrete, trackwork concrete, gas/water proof membrane systems, precast concrete floating slabs, and miscellaneous tunnel ring steel and elastomer assemblies (Omega Seals).

SERVICES

Self Perform Work

Cut & Cover Guideway and Underground Station Construction


Formwork for Structural Concrete Inverts, Walls, Tunnel Walkways, Elevated Decks.

Parking Structures


Formwork - Support for Elevated Decks

Underground Structures


Structural Concrete Placement - Invert, Walls, Decks, Miscellaneous Elements.

Trackwork


Concrete Placement for Trackwork.

Gas and Water Membrane Systems


Hydrocarbon Resistant Membrane (100 Mil HDPE & 60 Mil HDPE with Bentonite Liner), Waterbar, Hydrophilic Waterstops, and Remediation Systems.

Tunnel Seals


Elastomer Tunnel Seal & Steel Assemblies between bored tunnel and cut and cover structure interfaces.  

Precast Concrete Floating Slabs


Precast concrete floating slabs for the mitigation of noise and vibration supported by elastomer bearing and side compression pads.


Address

445 S Figueroa St, STE 3100
Los Angeles, CA, 90071, US

About us

Contractors Licenses:
CA CSLB #942926
WA Dept L&I #JNBUINB783PC

Certifications:
CA DBE CUCP #39353
LACMTA DBE/SBE #5543
CA DGS SBE-PW #1656740

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