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179 - Obtuse Angle Tee - Schedule 80
| Material/Finish: Aluminum Satin Anodized |
| Pipe Size: 1-1/2" IPS |
Product Description
The Hollaender Interna-Rail® 179 – Obtuse Angle Tee (Schedule 80) is a fixed-angle tee fitting designed for ADA-compliant handrail systems where a horizontal rail must connect to a post at a specific obtuse angle. Unlike adjustable fittings, the 179 Tee is manufactured at a fixed angle, allowing installers to achieve precise, repeatable geometry while maintaining a continuous, code-compliant gripping surface.
This fitting is manufactured from anodized aluminum and is designed to fit 1-1/2" IPS Schedule 80 pipe. As part of the Interna-Rail® mechanical system, the 179 Tee assembles using tubular rivets and socket head cap screws and requires a Rivet Nut Tool for installation. Integrated set screws provide a rigid, maintenance-free joint suitable for long-term use in public, commercial, and institutional environments.
Key Features
- Fixed-angle obtuse tee for Interna-Rail® ADA handrail systems
- Designed for 1-1/2" IPS Schedule 80 pipe
- Provides precise, non-adjustable geometry for consistent installations
- Maintains a continuous gripping surface through stair or ramp transitions
- Anodized aluminum finish resists corrosion and staining
- Set screws create a secure, long-lasting mechanical connection
- Requires Rivet Nut Tool for installation
Common Applications
- ADA-required handrails on ramps and stairways
- Public buildings, schools, offices, and government facilities
- Commercial and architectural railing systems
- Projects requiring precise, fixed obtuse-angle rail transitions
- Interna-Rail® layouts using Schedule 80 pipe
Specs / Compatibility
- Fitting Type: Hollaender Interna-Rail® 179 Obtuse Angle Tee
- Material: Anodized aluminum
- Pipe Compatibility: 1-1/2" IPS Schedule 80
- Angle Type: Fixed angle — customer must select the correct angle
- Available Angles: 29°, 32°, 35°, 38°, or 45°
- Connection Method: Tubular rivet + socket head cap screw
- Installation Requirement: Rivet Nut Tool required
- Joint Retention: Mechanical set screws
- Compliance: Supports ADA-compliant continuous handrail construction
- System Compatibility: Interna-Rail® modular railing system
What’s Included / Hardware
- One Hollaender Interna-Rail® 179 Obtuse Angle Tee (selected angle)
- Hardware included
- Note: This fitting is non-adjustable; verify the required angle before ordering
Care & Maintenance
The anodized aluminum finish requires minimal maintenance. Clean periodically with mild soap and water. Inspect mechanical connections to ensure fasteners remain properly seated.
Shipping & Availability
Ships via UPS or FedEx. Confirm required fixed angle and Schedule 80 pipe compatibility prior to ordering.
Need Help?
Need help choosing the right part? Visit our Contact Us page or call to speak with a specialist.
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| Angle | Material/Finish | Pipe Size | SKU | Description | Price | Qty | Unit | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 29 ° | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Aluminum Satin Anodized | 1-1/2" IPS | 58416-29 Ships within 24-48 hours, Local pickup available |
[58416-29] 179 - Obtuse Angle Tee - Schedule 80 (29 °)
Spec Sheet
|
$ 69.15 |
EACH |
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| 32 ° | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Aluminum Satin Anodized | 1-1/2" IPS | 58416-32 Ships in 3-4 weeks |
[58416-32] 179 - Obtuse Angle Tee - Schedule 80 (32 °)
Spec Sheet
|
$ 69.15 |
EACH |
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| 35 ° | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Aluminum Satin Anodized | 1-1/2" IPS | 58416-35 Ships in 3-4 weeks |
[58416-35] 179 - Obtuse Angle Tee - Schedule 80 (35 °)
Spec Sheet
|
$ 69.15 |
EACH |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 38 ° | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Aluminum Satin Anodized | 1-1/2" IPS | 58416-38 Ships in 3-4 weeks |
[58416-38] 179 - Obtuse Angle Tee - Schedule 80 (38 °)
Spec Sheet
|
$ 69.15 |
EACH |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 45 ° | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Aluminum Satin Anodized | 1-1/2" IPS | 58416-45 Ships in 3-4 weeks |
[58416-45] 179 - Obtuse Angle Tee - Schedule 80 (45 °)
Spec Sheet
|
$ 69.15 |
EACH |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Product Description
The Hollaender Interna-Rail® 179 – Obtuse Angle Tee (Schedule 80) is a fixed-angle tee fitting designed for ADA-compliant handrail systems where a horizontal rail must connect to a post at a specific obtuse angle. Unlike adjustable fittings, the 179 Tee is manufactured at a fixed angle, allowing installers to achieve precise, repeatable geometry while maintaining a continuous, code-compliant gripping surface.
This fitting is manufactured from anodized aluminum and is designed to fit 1-1/2" IPS Schedule 80 pipe. As part of the Interna-Rail® mechanical system, the 179 Tee assembles using tubular rivets and socket head cap screws and requires a Rivet Nut Tool for installation. Integrated set screws provide a rigid, maintenance-free joint suitable for long-term use in public, commercial, and institutional environments.
Key Features
- Fixed-angle obtuse tee for Interna-Rail® ADA handrail systems
- Designed for 1-1/2" IPS Schedule 80 pipe
- Provides precise, non-adjustable geometry for consistent installations
- Maintains a continuous gripping surface through stair or ramp transitions
- Anodized aluminum finish resists corrosion and staining
- Set screws create a secure, long-lasting mechanical connection
- Requires Rivet Nut Tool for installation
Common Applications
- ADA-required handrails on ramps and stairways
- Public buildings, schools, offices, and government facilities
- Commercial and architectural railing systems
- Projects requiring precise, fixed obtuse-angle rail transitions
- Interna-Rail® layouts using Schedule 80 pipe
Specs / Compatibility
- Fitting Type: Hollaender Interna-Rail® 179 Obtuse Angle Tee
- Material: Anodized aluminum
- Pipe Compatibility: 1-1/2" IPS Schedule 80
- Angle Type: Fixed angle — customer must select the correct angle
- Available Angles: 29°, 32°, 35°, 38°, or 45°
- Connection Method: Tubular rivet + socket head cap screw
- Installation Requirement: Rivet Nut Tool required
- Joint Retention: Mechanical set screws
- Compliance: Supports ADA-compliant continuous handrail construction
- System Compatibility: Interna-Rail® modular railing system
What’s Included / Hardware
- One Hollaender Interna-Rail® 179 Obtuse Angle Tee (selected angle)
- Hardware included
- Note: This fitting is non-adjustable; verify the required angle before ordering
Care & Maintenance
The anodized aluminum finish requires minimal maintenance. Clean periodically with mild soap and water. Inspect mechanical connections to ensure fasteners remain properly seated.
Shipping & Availability
Ships via UPS or FedEx. Confirm required fixed angle and Schedule 80 pipe compatibility prior to ordering.
Need Help?
Need help choosing the right part? Visit our Contact Us page or call to speak with a specialist.