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Simpson Strong-Tie LT3514 Top-Mount I-Joist Hanger, 3-1/2 in. x 14 in. I-joist
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LT3514 Top-Mount I-Joist Hanger, 3-1/2 in. x 14 in. I-joist
The LT3514 is an 18-gauge top-mount hanger for a 3-1/2 in. x 14 in. I-joist. It hooks over the header and secures the I-joist with one or two screws through the seat into the bottom flange.
Accommodates a skew of up to 5 degrees and cannot be field-modified.
Features and Common Uses
- 18-gauge steel, Zinc galvanized, G90 finish
- Joist secured with screws through the seat into the bottom flange
- Optional triangle nail holes for increased uplift
- Accommodates a skew of up to 5 degrees
Commonly used for:
- I-joist floor systems hung from LVL, glulam or sawn headers
Specifications
| Brand | Simpson Strong-Tie |
|---|---|
| Model | LT3514 |
| Carried member | 3-1/2 in. x 14 in. I-joist |
| Gauge | 18 ga. |
| Width (W) | 3-9/16 in. |
| Height (H) | 14 in. |
| Seat depth (B) | 2 in. |
| Top flange (TF) | 1-13/32 in. |
| Header fasteners | (6) 10d nails |
| Joist fasteners | (2) #8 x 1-1/4 in. wood screws |
| Finish | Zinc galvanized, G90 |
Dimensions, fastener schedule and allowable loads are from Simpson's catalogue table for the LT3514. Loads vary by lumber species, load duration and nailing option; confirm the value for your design before install.
How to Install
- Confirm the header can take every fastener specified.
- Hook the top flange over the header and nail it with (6) 10d nails.
- Seat the I-joist and drive (2) #8 x 1-1/4 in. wood screws through the seat into the bottom flange.
Full installation notes, fastener substitutions and load tables:
Frequently Asked Questions
Which nails do I need?
Header: (6) 10d nails. Joist: (2) #8 x 1-1/4 in. wood screws. Use the exact sizes Simpson specifies; a shorter or thinner nail lowers the allowable load. Simpson's catalogue table lists the load for each nailing option.
Can I use it on a pressure-treated deck?
Not this finish. G90 galvanizing is for dry, interior framing. For preservative-treated lumber or exterior exposure, Simpson calls for ZMAX, hot-dip galvanized or stainless steel connectors and matching fasteners. Ask us about the ZMAX or stainless version.