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Pemko 158 Series Fire-Rated Offset Saddle Threshold - 5-1/2"; Width, 1/2"; Height, UL 10C Certified Aluminum
Professional Fire-Rated Threshold Solution for Floor Surface Transitions
The Pemko 158 Series Offset Saddle Threshold provides a professional solution for creating smooth transitions between different floor surfaces with precise 5-1/2"; width and 1/2"; height dimensions. This fire-rated aluminum threshold accommodates a 1/4"; floor surface offset and is available in custom lengths from 24"; minimum to 185"; maximum. UL 10C positive pressure certified and ADA compliant, this threshold meets ANSI/BHMA A156.21 standards for commercial-grade reliability.
Professional Features & Benefits
- Precise Offset Dimensions: 5-1/2"; width and 1/2"; height specifically designed for 1/4"; floor surface offset applications between tile and carpet surfaces.
- Fire-Rated Construction: UL 10C positive pressure certified and UL 4L10 listed aluminum construction ensures code compliance in fire-rated assemblies.
- Custom Length Capability: Available in custom cut lengths from 24"; minimum to 185"; maximum for precise fit requirements in any application.
- ADA Compliant Design: Meets Americans with Disabilities Act requirements and ANSI/BHMA A117.1 standards for accessible transitions.
- Durable Aluminum Construction: Lightweight yet durable aluminum base material at 0.93 lbs provides long-lasting performance in commercial applications.
- Professional Certifications: ANSI/BHMA A156.21 Thresholds certified and BHMA certified for commercial-grade reliability and code compliance.
- Standard Fastening System: Includes WS #10 x 1.5"; wood screws standard with other fastener options available for various substrate requirements.
- Manufacturer Warranty: 5 Year warranty coverage for added confidence and protection in commercial installations.
Technical Specifications
- ANSI/BHMA: BHMA Certified, Fire Rated UL10C Positive Pressure, cUL Listed 4L10
- Commercial/Residential: Commercial
- Department: Door Hardware
- Hang Type: Offset Hung
- Product Category: Door Trim and Accessories
- Product Dimension: W: 5-1/2", H: 1/2";
- Product Group: Door Trim and Accessories
- Product Model: 158
- Product Subgroup: Door Thresholds
- Product Substrate: Aluminum
- Product Type: Commercial Thresholds
- Subcategory: Thresholds
- Warranty: 5 Year
Professional Applications
- Commercial Office Buildings
- Educational Facilities
- Healthcare Institutions
- Retail Establishments
- Industrial and Warehouse Facilities
- Multi-Tenant Residential Properties
- Government and Municipal Buildings
Why Choose Pemko Quality?
Pemko 158 Series thresholds deliver professional-grade reliability with fire-rated aluminum construction certified to UL 10C positive pressure standards and ADA compliance requirements. The 5 Year warranty coverage and BHMA certification ensure dependable performance in demanding commercial applications. Engineered for precise floor surface transitions where code compliance and accessibility standards are essential.
Manufacturer Resources
Pemko/Markar Products Full Line Catalog
Product Specs
- Warranty:
- 5 Year
- Subcategory:
- Thresholds
- ANSI/BHMA:
- BHMA Certified, Fire Rated UL10C Positive Pressure, cUL Listed 4L10
- Product Group:
- Door Trim and Accessories
- Product Subgroup:
- Door Thresholds
- Product Type:
- Commercial Thresholds
- Commercial/Residential:
- Commercial
- Hang Type:
- Offset Hung
- Product Model:
- 158
- Product Dimension:
- W: 5-1/2", H: 1/2"
- Product Category:
- Door Trim and Accessories
- Product Substrate:
- Aluminum
- Department:
- Door Hardware
Pemko 158D 72 – Frequently Asked Questions
1) Will the Pemko 158 threshold work where tile meets carpet and the two floors aren't level?
That's exactly the transition the 158 offset saddle is built for. It's an offset saddle threshold that takes up a 1/4 inch difference in floor height between the two surfaces, so the high side sits on the tile and the low side lands on the carpet side without a lip to trip on. Overall it measures 5-1/2 inches wide and 1/2 inch high. If both floors are dead level and you just need a saddle to cover the joint, an offset profile is the wrong shape and a flat saddle is the part to look for.
2) Is the Pemko 158 threshold approved for a fire-rated door opening?
Fire rated, and certified UL 10C positive pressure with a cUL 4L10 listing. It's also BHMA certified. The aluminum construction carries those ratings as supplied, so it can go under a rated assembly in a commercial corridor, stairwell, or exit opening.
3) Does the Pemko 158 saddle threshold meet ADA requirements for an accessible entrance?
Yes. The 158 is ADA compliant and meets ANSI/BHMA A117.1 for accessible transitions, with a 1/2 inch height and the offset profile absorbing a 1/4 inch difference between floor surfaces. That matters on any opening on an accessible route: healthcare, education, government, and multi-tenant residential jobs where the inspector is measuring the change in level at the door.
4) What lengths does the Pemko 158 threshold come in, and can I get it cut for a pair of doors?
Stock lengths are 36, 42, 48, and 72 inches, and the 158 is also available cut to custom lengths from 24 inches minimum up to 185 inches maximum. A 72 inch piece covers a standard pair of 3 foot leaves in one run, and the custom range covers anything wider without splicing two pieces at the center.
5) Which finishes does the Pemko 158 offset threshold come in, and will they match my other openings?
Two finishes: mill finish aluminum and dark bronze anodized aluminum. Both are offered in every stocked length, 36, 42, 48, and 72 inches, so a property manager standardizing a building can run one finish across every opening regardless of door width. Mill finish is the plain silver aluminum that blends with aluminum storefront; dark bronze anodized matches bronze-finish frames and hardware.
6) What fasteners come with the Pemko 158 threshold, and do they work in a concrete floor?
It ships standard with WS #10 x 1-1/2 inch wood screws. Those are for wood substrate. On concrete, which is what most commercial slabs under an exterior or corridor opening are, you'll need a different fastener option, and other fastener types are available for the various substrates. Sort that out before the crew shows up, because the screws in the box won't hold in slab.
7) Does the Pemko 158 threshold meet the ANSI/BHMA threshold standard for a spec job?
It's BHMA certified and meets ANSI/BHMA A156.21, the standard for thresholds, alongside the UL 10C positive pressure fire rating and cUL 4L10 listing. If the drawing calls for a BHMA certified fire-rated threshold, the 158 answers that line item. The model designation to put on the submittal is Pemko 158.
8) What's the difference between an offset saddle threshold and a regular saddle threshold?
An offset saddle has two different heights across its width so it bridges floors that finish at different elevations. The Pemko 158 handles a 1/4 inch difference, 5-1/2 inches wide overall and 1/2 inch high. A standard saddle is symmetrical and assumes both sides finish flush, so it's the choice where you're covering a joint in one continuous floor level. Pick by measuring the actual height difference at the door before you order, since an offset installed on level floors leaves a raised edge on one side.
9) Is a 5-1/2 inch wide threshold too wide for an interior door opening?
5-1/2 inches is a wide saddle, and it's the right width when you need to cover a real joint between two floor coverings plus the frame footprint underneath. On an interior opening with tile on one side and carpet on the other, that width lets the offset ramp run out gradually instead of stepping. Where you only need to cap a narrow gap under a single door, a narrower saddle is a cleaner install. The 158 is a commercial-duty part, aluminum, offset hung.
10) Can I use the Pemko 158 aluminum threshold in a hospital or school corridor with heavy traffic?
The 158 is rated commercial, not residential, and it's aluminum with UL 10C positive pressure and cUL 4L10 fire certification, which is what a healthcare or education corridor opening usually requires. It's in use across office buildings, schools, healthcare, retail, warehouse, multi-tenant residential, and government facilities. For an MRO buyer standardizing, the two finishes and four stock lengths plus cut-to-length up to 185 inches let one model cover the whole facility.
How fast can I get the Pemko 158D 72 delivered?
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Can I return it if it doesn’t work for me?
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reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Pemko 158D 72 come with a warranty?
Absolutely. The Pemko 158D 72 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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