Key Features
Adjusts On Site The Simpson Strong-Tie LS90Z Reinforcing Angle can be field-adjusted from 0 degrees to 135 degrees, so it works when framing members do not meet at a standard corner. That gives you one connector for a range of wood-to-wood repairs and framing tie-ins. ZMAX Corrosion Resistance The ZMAX finish is built for tougher exposure than standard galvanized hardware and is suitable for treated lumber. If the job calls for a connector that can hold up better over time, this matters. Load-Rated Layout This reinforcing angle uses defined fastener locations and published load values to help account for connection offset. In plain terms, it is not just a piece of bent steel. It is designed to make the connection predictable when installed correctly.
Overview
The Simpson Strong-Tie LS90Z Reinforcing Angle is a field-adjustable wood connector for reinforcing wood-to-wood framing connections. This is a reinforcing angle designed for fastening wood-to-wood members where the joint angle may vary. Model Number: LS90Z. If you are tying rafters, hip rafters, framing members, or repair pieces together and need more flexibility than a fixed 90 degree bracket gives you, this connector is built for that job.
What separates the LS90Z from a basic angle bracket is its adjustable design. It can be bent in the field from 0 degrees to 135 degrees, which makes it useful when members intersect at odd angles or when you are dealing with real-world framing that is not perfectly square. Simpson also notes that it is shipped at 45 degrees and should be bent one time only. That matters because this is meant to solve fit-up problems on site, not to be bent back and forth until the steel fatigues.
The LS series is described by Simpson Strong-Tie as a general utility reinforcing angle with multiple uses, and the LS90Z is the largest length in the provided series data at 7-7/8 inches. That longer body gives you more bearing area and more room for the specified fastener pattern compared with shorter versions in the same family. Each leg measures 2-1/4 inches, and the connector is made from 43 mil, 18 gauge steel. In practical use, that means a compact connector with enough material to serve as a real structural reinforcement piece for framing and repair work.
Material and finish matter a lot with connectors, especially around treated lumber and exterior exposure. The LS90Z uses carbon steel with a ZMAX finish, and supplementary product data identifies it as suitable for treated lumber. Simpson also specifies using hot-dip galvanized fasteners with ZMAX and hot-dip galvanized connector products to achieve the intended corrosion performance. That is one of those details that is easy to skip and expensive to ignore later.
Installation is straightforward, but the details matter. Simpson’s guidance is to use all specified fasteners and keep the joist constrained against rotation when using a single LS per connection. The product description also calls out that the LS connector has well-defined fastener locations and tabulated load values to account for connection eccentricities. In plain language, the hole pattern is there for a reason. If you want the published performance, you need the correct fasteners in the correct locations.
On actual jobs, this reinforcing angle makes the most sense for carpenters, framers, remodelers, and serious DIY users handling structural wood connections, angle repairs, and roof framing tie-ins. It is especially useful where a standard fixed-angle bracket is the wrong shape for the connection. If you want a flexible framing connector with a corrosion-resistant finish and published installation guidance, the Simpson Strong-Tie LS90Z Reinforcing Angle is the right kind of hardware to keep on hand.
Fits Angles That Standard Brackets Do Not
If the connection is not a clean 90 degrees, a fixed bracket can slow the whole repair down. The LS90Z is built to be adjusted on site so you can match the joint instead of forcing the framing to match the hardware.
- Field-adjustable from 0 degrees to 135 degrees
- Shipped at 45 degrees
- Bend one time only during installation
More Reach for Larger Reinforcement Jobs
The LS90Z gives you the longest body in the listed LS family, which is useful when the connection needs more coverage than a smaller reinforcing angle can provide. That extra length helps when tying framing members together across a bigger contact area.
- Overall length: 7-7/8 in.
- Leg dimensions: 2-1/4 in. x 2-1/4 in.
- 18 gauge, 43 mil steel construction
Built for Wood Framing and Repair Work
This style of connector is made for real framing tasks, not just shelf-duty hardware. Simpson specifically identifies the LS series for wood-to-wood fastening, household repairs, and framing connections such as roof rafter to hip rafter tie-ins.
- Application: fastening wood-to-wood
- Commonly used to reinforce structural connections and framing repairs
- Use all specified fasteners to achieve published load values
What’s in the Box
- (1) Simpson Strong-Tie LS90Z Reinforcing Angle
Fasteners are not included. Use the correct specified fasteners, and use hot-dip galvanized fasteners with ZMAX connectors.
Key Specifications
| Tool Type | Reinforcing angle |
|---|---|
| Application | Fastening wood-to-wood |
| Length (in.) | 7-7/8 in. |
| Leg Width (in.) | 2-1/4 in. x 2-1/4 in. |
| Thickness | 43 mil |
| Gauge | 18 ga. |
| Material | Carbon steel |
| Finish | ZMAX |
| Adjustable Angle Range | 0 degrees to 135 degrees |
| For Treated Lumber | Yes |
Compatibility
Fasteners Use all specified fasteners. With ZMAX and hot-dip galvanized connector products, use hot-dip galvanized fasteners meeting ASTM A153 requirements as noted in supplementary product data. Lumber Type Suitable for treated lumber based on supplementary product data. Connection Type Designed for wood-to-wood fastening, including framing intersections and roof framing connections where members meet at varying angles.
Built For
Carpentry Construction General Contracting Remodeling Roof Framing Wood Framing Repairs Woodworking DIY / Hobbyist
Pro Tip
Set the angle once before final fastening and do not rebend it. On ZMAX hardware like the LS90Z, match it with the correct hot-dip galvanized fasteners so you do not undermine the connector’s corrosion resistance.
Tool Nut’s Take
Tool Nut’s Take
Simpson Strong-Tie LS90Z Reinforcing Angle for Real-World Framing Fixes
This is the kind of connector that earns its keep when the framing is strong enough to matter and crooked enough to be annoying.
- Who it’s for: Carpenters, framers, remodelers, and serious DIY users reinforcing wood connections that do not land at a standard angle.
- Why it stands out: The adjustable 0 to 135 degree range is the big deal here, and the 7-7/8 inch length gives you more connector than the smaller LS options when the joint needs broader reinforcement.
- Worth knowing: The Simpson Strong-Tie LS90Z Reinforcing Angle is bend-once hardware, not something to tweak repeatedly, and fastener choice matters if you want the published performance and corrosion resistance.
Common Questions
- What is the LS90Z used for? It is used for fastening wood-to-wood members and reinforcing framing connections where the angle may vary, including roof framing and general repair work.
- How far can it be adjusted? The connector can be field-adjusted from 0 degrees to 135 degrees.
- Can it be used with treated lumber? Yes. Supplementary product data lists it as suitable for treated lumber.
- Can you bend it more than once? No. Simpson’s installation guidance says to bend it one time only.
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