# Door Hardware Standards

## Hardware Functions

### Lock Functions
| Function | Description | Use |
|----------|-------------|-----|
| Passage | Always unlocked, no key | Closets, corridors |
| Privacy | Inside button locks, emergency release | Bathrooms, bedrooms |
| Entry | Key outside, thumb turn inside | Residential entry |
| Storeroom | Always locked, key required | Storage, mechanical |
| Classroom | Key locks/unlocks outside, always free inside | Classrooms |
| Office | Key locks/unlocks outside, button inside locks | Offices |
| Communicating | Key either side | Connecting rooms |
| Exit only | Always locked from outside | Emergency exits |

### ADA Hardware Requirements
- 34"-48" mounting height
- Operable with one hand
- No tight grasping, pinching, or twisting
- Max 5 lbs operating force
- Lever handles or push/pull

---

## Locksets and Latchsets

### Residential
| Type | Backset | Door Prep |
|------|---------|-----------|
| Cylindrical (knob) | 2-3/8" or 2-3/4" | 2-1/8" hole |
| Tubular (lever) | 2-3/8" or 2-3/4" | 2-1/8" hole |
| Mortise (high-end) | 2-1/2" or 2-3/4" | Mortise pocket |
| Deadbolt | 2-3/8" or 2-3/4" | 2-1/8" hole |

### Commercial
| Grade | Cycles | Use |
|-------|--------|-----|
| Grade 1 | 800,000 | High traffic, institutional |
| Grade 2 | 400,000 | Medium traffic, commercial |
| Grade 3 | 200,000 | Light traffic, residential |

### Fire-Rated Door Hardware
- Listed for fire rating of door
- No hold-open devices (unless connected to fire alarm)
- Self-latching required
- Closers required on most rated doors
- No electromagnetic locks without smoke detection

---

## Hinges

### Hinge Sizing
| Door Width | Door Height | Hinge Size | Quantity |
|------------|-------------|------------|----------|
| Up to 32" | Up to 60" | 3-1/2" | 2 |
| Up to 36" | 60"-90" | 4" | 3 |
| Up to 36" | 90"-120" | 4-1/2" | 4 |
| Up to 48" | Any | 5" | 4+ |

### Hinge Types
| Type | Use |
|------|-----|
| Butt hinge | Standard doors |
| Ball bearing | Heavy traffic, commercial |
| Spring hinge | Self-closing without closer |
| Continuous (piano) | High-abuse, security |
| Pivot | Heavy doors, floor mount |
| Concealed | Modern aesthetic |

### Hinge Materials/Finishes
| Code | Finish |
|------|--------|
| US3 | Bright brass |
| US10 | Satin brass |
| US26 | Bright chrome |
| US26D | Satin chrome |
| US32 | Bright stainless |
| US32D | Satin stainless |
| US10B | Oil rubbed bronze |

---

## Door Closers

### Closer Sizing
| Size | Max Door Width | Notes |
|------|----------------|-------|
| Size 1 | 27" | Light duty |
| Size 2 | 30" | Interior |
| Size 3 | 36" | Standard |
| Size 4 | 42" | Heavy duty |
| Size 5 | 48" | Very heavy |
| Size 6 | 54" | Extra heavy |

### Closer Types
| Type | Mount Location | Use |
|------|----------------|-----|
| Surface overhead | Door face/frame | Most common |
| Concealed overhead | Door top | Clean aesthetic |
| Floor closer | Floor | Glass/heavy doors |
| Spring hinge | Hinge location | Light duty |

### ADA Closer Requirements
- Opening force: 5 lbs max (interior), 8.5 lbs max (fire)
- Closing time: 5 seconds from 90° to 12°
- No more than 15 lbs to set in motion

---

## Exit Devices (Panic Hardware)

### Types
| Type | Application |
|------|-------------|
| Rim | Surface mount, most common |
| Mortise | Concealed, high security |
| Vertical rod | Double doors, surface or concealed |
| Crossbar | Commercial/industrial |
| Touch bar | Modern, low profile |

### Requirements
- Required at occupancy load > 50 (Assembly)
- Required at occupancy load > 100 (Educational)
- Labeled for fire rating of door
- Must unlatch with single motion
- Max 15 lbs operating force

### Trim Options
| Trim | Function |
|------|----------|
| Blank | No outside access |
| Pull | Outside pull only |
| Lever | Keyed outside access |
| Thumbpiece | Keyed with thumb turn |

---

## Electronic Hardware

### Access Control Types
| Type | Security Level | Cost |
|------|----------------|------|
| Keypad | Low | $ |
| Card reader (prox) | Medium | $$ |
| Card reader (smart) | High | $$$ |
| Biometric | Very high | $$$$ |
| Bluetooth/mobile | High | $$$$ |

### Electric Strikes
- Fail-safe: unlocked when power fails (most egress doors)
- Fail-secure: locked when power fails (high security)
- Fire-rated doors: fail-safe with fire alarm override

### Magnetic Locks
- Max 1,200 lbs holding force
- Requires secondary release (REX button, motion sensor)
- Must release on fire alarm
- Not recommended for primary egress

### Power Requirements
| Device | Voltage | Amps |
|--------|---------|------|
| Electric strike | 12-24V DC | 0.3-0.5A |
| Mag lock | 12-24V DC | 0.3-0.5A |
| Auto operator | 120V AC | 3-5A |
| Card reader | 12V DC | 0.2A |

---

## Door Closers Schedule

### Surface Mounted Schedule
| Mark | Type | Size | Finish | Notes |
|------|------|------|--------|-------|
| DC-1 | Overhead surface | 3 | US26D | Standard interior |
| DC-2 | Overhead surface | 4 | US26D | Heavy traffic |
| DC-3 | Overhead surface | 5 | US32D | Exterior/fire |

### Adjustment Requirements
- Sweep speed: 5-7 seconds (70° to closed)
- Latch speed: Quick, but not slamming
- Backcheck: Prevent door from slamming open
- Delayed action: Only where required (accessibility)

---

## Thresholds and Weatherstripping

### Threshold Types
| Type | Height | Use |
|------|--------|-----|
| Flat/saddle | 1/2" max | Interior, ADA |
| Bumper | 1/2"-3/4" | Exterior residential |
| Thermal break | 3/4"-1" | Exterior commercial |
| Interlocking | 1" | High weather protection |

### ADA Threshold Requirements
- 1/2" max height
- 1/4" max vertical
- Beveled 1:2 if over 1/4"

### Weatherstripping Types
| Location | Type |
|----------|------|
| Head | Pile, fin, bulb |
| Jamb | Pile, bulb, magnetic |
| Meeting stile (pairs) | Astragal |
| Bottom | Sweep, auto drop, shoe |

---

## Hardware Sets

### Typical Residential Set
| Item | Quantity |
|------|----------|
| Lockset or lever | 1 |
| Deadbolt (entry) | 1 (entry doors) |
| Hinges | 3 |
| Door stop | 1 |
| Weatherstrip (exterior) | 1 set |

### Typical Commercial Interior
| Item | Quantity |
|------|----------|
| Lever lockset | 1 |
| Hinges (ball bearing) | 3 |
| Closer | 1 |
| Door stop | 1 |
| Silencer | 3 |

### Typical Commercial Entry
| Item | Quantity |
|------|----------|
| Lever lockset or exit device | 1 |
| Hinges (ball bearing) | 3 |
| Closer | 1 |
| Door stop | 1 |
| Threshold | 1 |
| Weatherstrip | 1 set |
| Kick plate (optional) | 1 |

### Fire-Rated Door Set
| Item | Requirement |
|------|-------------|
| Hinges | Steel, listed |
| Lockset | Labeled |
| Closer | Listed, adjustable |
| Coordinator (pairs) | Required |
| Astragal (pairs) | If required for smoke |
| Smoke seal | If required |

---

## Hardware Finishes

### Common Finishes
| BHMA | US | Description |
|------|-----|-------------|
| 605 | US3 | Bright brass |
| 606 | US4 | Satin brass |
| 612 | US10 | Satin bronze |
| 613 | US10B | Oil rubbed bronze |
| 625 | US26 | Bright chrome |
| 626 | US26D | Satin chrome |
| 629 | US32 | Bright stainless |
| 630 | US32D | Satin stainless |

### Finish Selection by Location
| Location | Recommended Finish |
|----------|-------------------|
| Interior residential | US26D, US10B, match décor |
| Interior commercial | US26D, US32D |
| Exterior | US32D (stainless for coast) |
| Coastal/corrosive | US32D or US32 stainless |

---

## Keying

### Keying Systems
| Type | Description |
|------|-------------|
| Keyed different (KD) | Each lock has unique key |
| Keyed alike (KA) | Multiple locks, same key |
| Master keyed (MK) | Master opens all, individual keys work one |
| Grand master (GMK) | Multiple master key levels |
| Construction keying | Temporary keys during construction |

### Master Key Hierarchy
```
Grand Master (GMK)
├── Master (MK1) - Floor 1
│   ├── Individual keys 101-110
├── Master (MK2) - Floor 2
│   ├── Individual keys 201-210
```

### Best Practices
- Limit master key levels (security decreases with more levels)
- Control key distribution
- Key records maintained
- Construction keys invalidated at turnover
