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NCA/TB/LTB Bridging

NCA/TB/LTB

NCA — Nailless installation eliminates callbacks for nail squeaks. Designed for secure grip before the drive-home blow, and deeper prong penetration. Precision-formed into a rigid "V" section.

TB — Tension-type bridging with maximum nailing flexibility. Use just two of the seven nail holes at each end.

LTB — Staggered nail pattern accommodates 2x8 and 2x10 joists. Use just two of the six nail holes at each end. LTB40 has rigid prongs that install easily into the joist, and embossments that allow crisp bends.

Material

  • LTB — 22 gauge; NCA and TB — 20 gauge (except NCA2x12-16 — 18 gauge)

Finish

  • Galvanized

Installation

  • Support floor joists with a depth-to-thickness ratio of six or more with bridging at intervals not exceeding 8'. If span is greater than 8', install on 2x8 or larger joists. If span is greater than 16', use more than one pair.
  • Tension bridging works only in tension, so must be used in cross pairs.
  • Install bridging tightly; loose installation may allow floor movement.
  • NCA may be installed before or after sheathing, from the top or bottom. Simply locate the bend line approximately 1" from the joist edge.
  • NCA has nail holes in one end for use if a prong is bent during installation. Fully seat nails if they are used; otherwise, they may lead to squeaks.
  • TB requires two 10d x 1 1/2" fasteners per end.
  • LTB requires two 6d commons per end.

Code Reference

  • International Residential Code® — 2009/2012 R502.7.1 and R802.8.1

Related Links

Catalog Pages

Related Literature

Product Information Tables

Tension Bridging for I-Joists

Tension Bridging for Solid Sawn Lumber

Code Reports

Part IAPMO UES ER ICC-ES ESR City of Los Angeles State of Florida
LTBSee specific model numbers for code listings.
LTB20 ESR-2608 ESR-2523 RR25725 FL10864
LTB40 ESR-2608 ESR-2523 RR25725 FL10864
NCASee specific model numbers for code listings.
NCA2 No code listing. Please contact us for test data.
NCA2x10-12 ESR-2608 ESR-2523 RR25725 FL10864
NCA2x10-16 ESR-2608 ESR-2523 RR25725 FL10667 FL10864
NCA2x10-16 ESR-2608 ESR-2523 RR25725 FL10667 FL10864
NCA2x12-12 ESR-2608 ESR-2523 RR25725 FL10864
NCA2x12-16 ESR-2608 ESR-2523 RR25725 FL10864
NCA2x12-16 ESR-2608 ESR-2523 RR25725 FL10864
NCA2x8-12 ESR-2608 ESR-2523 RR25725 FL10864
NCA2x8-16 ESR-2608 ESR-2523 RR25725 FL10864
TBSee specific model numbers for code listings.
TB20 ESR-2608 ESR-2523 RR25725 FL10864
TB27 ESR-2608 ESR-2523 RR25725 FL10864
TB30 ESR-2608 ESR-2523 RR25725
TB36 ESR-2608 ESR-2523 RR25725 FL10864
TB42 ESR-2608 ESR-2523 RR25725
TB48 ESR-2608 ESR-2523 RR25725
TB54 ESR-2608 ESR-2523 RR25725
TB56 ESR-2608 ESR-2523 RR25725
TB60 ESR-2608 ESR-2523 RR25725

ESR-2523 is an Index of many of Simpson Strong-Tie Stamped and Welded Cold-formed Steel Products for Wood or Cold-formed Steel Construction

Drawings

Part Orthographic Perspective
LTBNone None
LTB20
LTB20
DWGDXF
LTB20 front view
DWG DXF
LTB20 top view
DWG DXF
None
LTB40
LTB40
DWGDXF
LTB40
DWG DXF
NCANone None
NCA2None None
NCA2x10-12
NCA2X10-12
DWGDXF
NCA2X10-12 front view
DWG DXF
NCA2X10-12 right view
DWG DXF
NCA2X10-12 top view
DWG DXF
None
NCA2x10-16
NCA2X10-16
DWGDXF
NCA2X10-16 front view
DWG DXF
NCA2X10-16 right view
DWG DXF
NCA2X10-16 top view
DWG DXF
None
NCA2x12-12None None
NCA2x12-16
NCA2X12-16
DWGDXF
NCA2X12-16 front view
DWG DXF
NCA2X12-16 left view
DWG DXF
NCA2X12-16 right view
DWG DXF
NCA2X12-16 top view
DWG DXF
None
NCA2x8-12None None
NCA2x8-16None None
TBNone None
TB20None None
TB27
TB27
DWGDXF
TB27 front view
DWG DXF
TB27 right view
DWG DXF
TB27 CFS
DWG DXF
TB27
DWG DXF
TB30
TB30
DWGDXF
TB30 front view
DWG DXF
TB30 right view
DWG DXF
None
TB36
TB36
DWGDXF
TB36 front view
DWG DXF
TB36 right view
DWG DXF
None
TB42
TB42
DWGDXF
TB42 front view
DWG DXF
TB42 right view
DWG DXF
None
TB48None None
TB54None None
TB56None None
TB60None None