Hr Stud

The phrase "hr stud" primarily refers to three distinct commercial and industrial contexts: architectural fire-rating specifications, specialized performance automotive parts, and historic office partition systems.

1. Architectural & Construction (Current Market)

In modern construction and architectural drawings, "HR stud" is a common abbreviation for Fire-Resistance Rating (HR stands for "Hour") applied to wall assemblies YcusdScribd.

* 1-HR & 2-HR Stud Walls: These are the industry standard for commercial buildings, specifying how long a wall (constructed with wood or metal studs and specialized gypsum board) can withstand fire YcusdAmazonaws.

* Market Trends: There is a growing demand for these assemblies driven by stricter safety regulations like the California Building Code (CBC) and Title 24 Ycusd. Trends emphasize "hefty" 3/4-inch gypsum panels to achieve both fire safety and high sound transmission class (STC) ratings (typically 42–50 STC) Usmodernist.

2. Automotive & Performance Parts (Niche Market)

In the automotive sector, "HR stud" refers to two specific performance-related items:

* HR Wheel Stud Pattern: Refers to the specific wheel bolt pattern used on classic Holden HR vehicles (an iconic Australian car) GumtreeGumtree. Collectors and restorers actively trade these parts, with sets often selling for approximately $450 in the secondary market Gumtree.

* HR Stud Spacing (Engine Components): In specialized racing, particularly for Rotax 100cc kart engines, "HR stud spacing" is a rare technical specification for disk valve covers FacebookFacebook. It is sought after by vintage karting enthusiasts for its innovative Italian "thunderbolt" design heritage Facebook.

* B2B Availability: Manufacturers like Jinan High Racing produce modern Titanium Wheel Studs (often abbreviated in listings as "HRMin" or "High Racing") targeting premium Japanese and luxury vehicle segments (Toyota, Lexus, Honda) Alibaba. Prices for these high-end titanium fasteners range from $6.50 to $9.00 per unit with MOQs around 20 pieces Alibaba.

3. Historical Partition Systems (Legacy Context)

Historically, the "H-R stud assembly" was a signature component of the ULTRAWALL Movable Partition System by United States Gypsum (U.S.G.) in the mid-1970s UsmodernistUsmodernist.

* Innovation: It was a trend-setter for its time, allowing for internal wall accessibility (for wiring) without compromising the security of a permanent-feeling wall Usmodernist.

* Legacy: While largely superseded by modern modular systems, it remains a reference point in architectural archives for the shift toward flexible office design Usmodernist.