Cold-Formed Steel: HTT, S/LTT & S/HTT Tension Ties

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HTT, S/LTT & S/HTT Tension Ties

The HTT and S/HTT is a single-piece formed tension tie—no rivets, and a 4-ply formed seat. No washers are required.

The S/LTT, S/HTT and HTT Tension Ties are ideal for retrofit or new construction projects. They provide high-strength, post-pour, concrete-to-steel connections.

Material:

S/HTT14, HTT4, HTT5 — 111 mil (11 ga)
S/LTT20B — Strap: 97 mil (12 ga); Plate: 229 mil (3 ga)

Finish: Galvanized.

Installation:

Use all specified fasteners.
Use the specified number and type of screws to attach the strap portion to the steel stud. Bolt the base to the wall or foundation with a suitable anchor; see table for the required bolt diameter.
Do not install S/LTT20 raised off of the bottom track.

top Gallery:

roll over images below to see larger image


HTT5 (HTT4 similar) U.S. Patent 5,467,570	S/LTT20	S/HTT14 U.S Patent 5,467,570	Typical HTT5 Installation as a Holdown
UPDATE SEPT. 2009: S/HTT14 is now being manufactured with different tooling. This has caused some minor dimensional changes in the part. The images above have been updated to reflect these changes, as have the DWG and DXF drawings below.

top Load Table: See code report listings below

The Designer shall specify the anchor embedment and configuration.
See anchor bolt options: SB Anchor Bolts, SSTB Anchor Bolts, RFB Retrofit Bolts, PAB Pre-Assembled Anchor Bolts.
See anchor bolt retrofit options.
Stud design by Specifier. Tabulated loads are based on a minimum studs thickness for fastener connection.
Deflection at ASD and LRFD Loads is the deflection of the holdown measured between the anchor bolt and strap portion of the holdown when loaded to the ASD and LRFD load, respectively. This movement is strictly due to the holdown deformation under a static load test attached to members listed in the table.
Nominal Tension Load is based on the average ultimate (peak) load from tests. AISI Lateral Design standard requires holdown to have nominal strength to resist lesser of amplified seismic load or the maximum force the system can deliver.

top Code Reports (PDFs):

					Legacy Reports
	IAPMO UES ER	ICC-ES ESR	CITY OF LOS ANGELES	STATE OF FLORIDA	ICC-ES NER	ICC-ES ER	ICC-ES ES
HTT4	ER-130 / ER-124		RR25818 / RR25489	FL10456 / FL11496
HTT5	ER-130 / ER-124		RR25818 / RR25489	FL10456 / FL11496
S/HTT	See specific model numbers for code listings.
S/HTT14	ER-124		RR25489	FL13872
S/LTT	See specific model numbers for code listings.
S/LTT20	ER-124		RR25489	FL13872

topDrawings: To download drawings, right-click or Ctrl-click on the link, then choose "Save Target As..."

Download the Simpson Strong-Tie® AutoCAD® Menu, which allows you to insert Ortho views directly into your AutoCAD drawing.

	ORTHOGRAPHIC	PERSPECTIVE
HTT4	HTT4: DWG \| DXF HTT4 front view: DWG \| DXF HTT4 left view: DWG \| DXF HTT4 right view: DWG \| DXF HTT4 top view: DWG \| DXF	None for this model
HTT5	HTT5: DWG \| DXF HTT5 front view: DWG \| DXF HTT5 left view: DWG \| DXF HTT5 right view: DWG \| DXF HTT5 top view: DWG \| DXF	HTT5: DWG \| DXF
S/HTT	None for this model	None for this model
S/HTT14	S/HTT14: DWG \| DXF S/HTT14 front view: DWG \| DXF S/HTT14 left view: DWG \| DXF S/HTT14 right view: DWG \| DXF S/HTT14 top view: DWG \| DXF	S/HTT14: DWG \| DXF S/HTT14 installation: DWG \| DXF
S/LTT	None for this model	None for this model
S/LTT20	S/LTT20: DWG \| DXF S/LTT20 front view: DWG \| DXF S/LTT20 left view: DWG \| DXF S/LTT20 right view: DWG \| DXF S/LTT20 top view: DWG \| DXF	None for this model