---
title: What is the optimal recess below a roadway surface for Modular Expansion Joint Systems?
description: Steelflex Modular Expansion Joint Systems are a highly engineered system comprised of dynamic load bearing center beams welded to multiple support bars and cast-in-place into expansion joint.
---

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# What is the optimal recess below a roadway surface for Modular Expansion Joint Systems?

## Steelflex Modular Expansion Joint Systems are a highly engineered system comprised of dynamic load bearing center beams welded to multiple support bars and cast-in-place into expansion joint.

**Answer:** An acceptable recess below a roadway surface for Modular Expansion Joint Systems would be 0”- 1/4,” but check your specific project and contract requirements.

### Learn more about Expansion Joint Systems

Since the early 1960s The D.S. Brown Company has provided [expansion joint systems](https://www.dsbrown.com/product-category/bridges/expansion-joint-systems/) and structural bearing assemblies for bridges around the globe. Bridge expansion joint systems are directly exposed to vehicular wheel loads and, therefore, must resist dynamic forces causing fatigue and wear. In addition, these expansion joint systems must remain watertight to protect the bridge superstructure and substructure from corrosion. 

![SSPA-faded-Strip-Seal-Rail-2](https://learn.dsbrown.com/hs-fs/hubfs/SSPA-faded-Strip-Seal-Rail-2.jpg?width=484&name=SSPA-faded-Strip-Seal-Rail-2.jpg)

- [Steelflex Modular Expansion Joint Systems](https://www.dsbrown.com/product/steelflex-modular-expansion-joint-systems/)
- [Steelflex Strip Seal Expansion Joint Systems](https://www.dsbrown.com/product/steelflex-strip-seal-expansion-joint-systems/)

 

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