| Regulatory Code | Agency / Standard | Scope & Threshold Requirements | Compliance |
|---|---|---|---|
| USPS-STD-4C | U.S. Postal Service | Mandates 1:5 parcel locker ratio (1 package compartment per 5 delivery slots). Required on all multi-family permits. | Mandatory |
| CBC Title 24 § 11B | California Building Code | Accessible reach envelope: Lowest tenant lock ≥ 15" AFF; Highest tenant lock ≤ 48" AFF. Clear floor space 30" x 48". | Mandatory |
| CBC Seismic Zone 4 | Div. of the State Architect | Concrete footings > 3,000 PSI with 1/2" dia. hot-dipped zinc wedge anchors (min 4.5" embedment) for outdoor CBU pedestals. | Mandatory |
| 18 U.S.C. § 1704 | Federal Criminal Code | Arrow Lock cylinder custody restricted strictly to postal carriers. Contractor provides master bracket; Postmaster inserts lock. | Federal Law |
| SFFD Bull. 5.09 | San Francisco Fire Dept | Emergency Knox key switch or mechanical master entry lockbox for secure building vestibules & lobbies. | Regional Spec |
| System Type | Materials & Gauge | Lock Mechanism | Mounting Detail | Security Level |
|---|---|---|---|---|
| Salsbury 4C Horizontal | Heavy-duty extruded aluminum with 300 series stainless components. Marine powder-coat. | Heavy-duty 5-pin cylinder tenant cam locks with 3 keys per cylinder. Master Arrow prep. | Recessed into wood/steel 16" O.C. framing or semi-recessed with aluminum collar. | High Urban Security • Anti-Pry overlapping master door seams. |
| Salsbury CBU Pedestal | Aircraft aluminum alloy casing with 360-degree wrapped stainless steel pedestal base. | USPS Arrow Lock master carrier latch. Captive dual-key parcel retention cylinders. | 3000 PSI concrete pad ≥ 4" thickness. 4x 1/2" x 4.5" wedge expansion anchors. | Seismic Grade-4 • Salt air corrosive resistant (ASTM B117 salt spray certified). |
| Fort Knox Mailbox | Solid 1/4" cold-rolled structural steel plate casing with 10-gauge steel pry-proof door. | Medeco / Abloy high-security drill-resistant deadbolt or 7-pin heavy-duty tubular locks. | Surface-bolted to rebar-reinforced slab or core-drilled 5" steel post into concrete footing. | Maximum Defense • Sledgehammer, fishing-baffle, and crowbar proof. |
Concrete Strength: Minimum compressive strength of 3,000 PSI at 28 days cure.
Pad Dimensions: Minimum 48" W x 48" D x 6" H (single unit) or continuous pad.
Sub-base Preparation: 4" compacted aggregate base (Class 2 AB) compacted to 95% relative compaction.
Slope Gradient: 1% to 2% slope maximum away from pedestal to prevent moisture pooling.
Anchor Spec: 1/2" diameter x 4-1/2" (or 5-1/2") Zinc-Plated Carbon Steel Wedge Anchors.
Embedment Depth: Minimum 3-1/2" into structural concrete slab.
Installation Torque: 55 ft-lbs torque applied with calibrated torque wrench.
Security Nuts: Tamper-resistant breakaway or rounded cap nuts inside locked base shroud.
| Corridor / District | Coordinating Processing & Distribution Center | Lead Time | Contractor Scope of Handover |
|---|---|---|---|
| San Francisco & Peninsula | Evans Avenue Main Post Office (SF P&DC) | 10-14 Business Days | Provide CAD layout, parcel ratio verification, Title 24 reach heights, and schedule joint inspection with carrier supervisor. |
| East Bay Corridor | Oakland Main P&DC (1675 7th Street) | 10-14 Business Days | Coordinate with local carrier operations in Oakland, Berkeley, or Hayward. Secure arrow lock installation appointment. |
| Silicon Valley / South Bay | San Jose Main P&DC (Lundy Avenue) | 10-14 Business Days | Route pre-approval for tech campuses and mid-rise master plans in Santa Clara, Sunnyvale, and San Jose jurisdictions. |
| Parcel Locker 1:5 Ratio Verified: Configuration meets or exceeds 1 parcel locker compartment per 5 tenant delivery compartments. | |
| California Title 24 Reach Envelopes: Lowest compartment ≥ 15" AFF; Highest tenant lock ≤ 48" AFF for designated accessible units. | |
| USPS Arrow Lock Cylinder Bracket: Master factory bracket aligned and intact. Master door swings freely without drag. | |
| Seismic Zone 4 Anchorage: Anchors torqued to 55 ft-lbs in 3,000+ PSI slab with no concrete cracking observed. |