Atir Strap And Beamd With 72 Install Page

| Component | Specification | |--------------------|--------------------------------------------| | Strap material | 12 ga. (2.6 mm) galvanized steel | | Strap dimensions | 1.5" wide x 20" long x 72 fastener holes | | Fastener type | #10 x 1.5" hardened steel screw or 10d nail | | Fastener quantity | 72 per strap | | Installation spacing | Max. 72 inches (1829 mm) o.c. along beam | | Edge distance | Min. 1.5 inches (38 mm) from beam end | | Load capacity | 2,500 lbs tension / 1,800 lbs shear (per strap) |

If "Beamd" refers to a BT (Beam Tie) or BC (Beam Connector) used to connect wood beams to posts or headers:

Tools Needed:

Fastener Types:

Installation Steps:

In modern construction and seismic retrofitting, the synergy between tension-tie systems and continuous load paths is critical. Among the most reliable methods for connecting roof structures to wall framing is the use of the Atir Strap (often a proprietary or generic term for a heavy-duty galvanized steel tension tie) in conjunction with a bonded beam. When specifications call for a “72 Install,” they are referencing a specific, high-capacity anchoring protocol that demands attention to detail, precise fastening schedules, and adherence to engineered load values.

Let’s talk engineering. Suppose your beam supports a roof with a tributary width of 12 feet. If the beam span between posts is 72 inches (6 feet), the tributary area is: atir strap and beamd with 72 install

6 ft (span) × 12 ft (width) = 72 sq ft

In a 140 mph wind zone, ASCE 7-16 calculates uplift pressure at roughly 30 psf. That’s 2,160 lbs of uplift on that connection. The ATIR strap with a proper 72-inch installation (continuous fastening over 6 feet) distributes that load across 24+ fasteners, each rated for ~100 lbs in withdrawal. The math works.

If you shortened the fastening pattern to, say, 24 inches, you’d concentrate the load, likely causing fastener pull-out or wood splitting. Fastener Types:

Even experienced contractors botch the ATIR “72 install.” Here are the top 5 errors: