👉 Important:
The 13 ft side represents the width of the pergola.
The 19 ft side represents the length, which is divided into two equal bays.
Each bay shares a center post that supports both roof sections.
All measurements are shown in millimeters (mm), inches (in), and feet (ft).
📏 Post-to-Post Measurements – 13 ft (4 m) Width
Measurement Type | Description | mm | in | ft |
Outer to Outer Post | Distance between the outermost edges of both posts (full pergola width). | 3945 mm | 155.31 in | 12.94 ft |
Outer to Inner Post | From the outer edge of one post to the inner edge of the opposite post. | 3825 mm | 150.59 in | 12.55 ft |
Inner to Inner Post | Clear open span between the inner sides of both posts. Represents your usable interior width. | 3705 mm | 145.87 in | 12.16 ft |
💡 Tip: Use the outer-to-outer post measurement (3945 mm / 12.94 ft) to outline your pergola’s full width when marking corner points or footers.
⚙️ Baseplate-to-Baseplate Measurements – 13 ft (4 m) Width
Measurement Type | Description | mm | in | ft |
Inner to Inner Baseplate | Distance between the inner edges of both baseplates. | 3645 mm | 143.50 in | 11.96 ft |
Outer to Inner Baseplate | From outer baseplate edge of one post to the inner edge of the opposite. | 3825 mm | 150.59 in | 12.55 ft |
Outer to Outer Baseplate | Total width across both outermost baseplate edges. Defines maximum mounting footprint. | 4005 mm | 157.68 in | 13.14 ft |
💡 Tip: When drilling anchors, use the outer-to-outer baseplate spacing (4005 mm / 13.14 ft) to ensure perfect post alignment across the pergola width.
📏 Post-to-Post Measurements – 19 ft (6 m) Length (Double Bay Side)
Measurement Type | Description | mm | in | ft |
Outer to Outer Post | Distance between outermost posts along the 19 ft span. | 2904 mm | 114.33 in | 9.53 ft |
Outer to Inner Post | From the outer edge of one post to the inner edge of the opposite post. | 2784 mm | 109.61 in | 9.13 ft |
Inner to Inner Post | Clear internal space between both inner faces of posts. | 2664 mm | 104.88 in | 8.74 ft |
💡 Tip: The 19 ft side consists of two identical bays, each measuring 2904 mm (9.53 ft) from outer-to-outer post.
The center posts support both roof sections, so accurate alignment is critical when positioning anchors or footers.
⚙️ Baseplate-to-Baseplate Measurements – 19 ft (6 m) Length
Measurement Type | Description | mm | in | ft |
Inner to Inner Baseplate | Distance between inner baseplate edges of one bay. | 2604 mm | 102.52 in | 8.54 ft |
Outer to Inner Baseplate | From outer edge of one baseplate to inner edge of the opposite baseplate. | 2784 mm | 109.61 in | 9.13 ft |
Outer to Outer Baseplate | Total span across outermost baseplate edges of one bay. | 2964 mm | 116.69 in | 9.72 ft |
💡 Tip: When laying out both bays, maintain consistent spacing between the shared center posts to ensure proper roof beam connection and equal load distribution.
📏 End Post Measurements (Double Bay)
Measurement Type | Description | mm | in | ft |
Outer End to Outer End Post | Distance between the outermost posts of both bays. Defines full pergola length. | 5688 mm | 223.86 in | 18.66 ft |
Inner End to Inner End Post | Distance between the two center posts (shared between bays). | 5448 mm | 214.49 in | 17.87 ft |
💡 Tip: Check your total layout using the outer end-to-end distance (5688 mm / 18.66 ft) to confirm correct total pergola length.
Center posts must align perfectly to avoid beam misalignment during assembly.
📐 Post Height Measurements
Measurement Type | Description | mm | in | ft |
Post Edge (ground) to Beam | Height from ground to the underside of the beam. | 2330 mm | 91.73 in | 7.64 ft |
Outer to Outer Post Height | Overall height from base to top beam edge. | 2503 mm | 98.54 in | 8.21 ft |
Post Edge (ground) to Open Louvers Top | Height from ground to top of louvers when fully open. | 2560 mm | 100.79 in | 8.40 ft |
💡 Tip: Allow at least 100 mm (≈ 4 in) of overhead clearance if installing near eaves or rooflines to ensure smooth louver operation and heat expansion tolerance.
🧩 Installation Planning Tips
Mark your layout using the outer-to-outer post measurements for all corners before drilling or pouring footers.
Check diagonals on both bays — all diagonals should be equal for a perfectly square structure.
Recommended footer size: 400 × 400 mm (16 × 16 in) and 400 mm (16 in) deep for stable anchoring.
Leave 30 mm (1.2 in) clearance on each side for fine alignment during assembly.
Ensure level installation across both bays before securing shared center posts.
Verify beam connection between bays before tightening hardware to prevent twisting or stress on louvers.
📐 13x19 Pro+ Manual Freestanding Pergola — Post-to-Post Measurements
Need the exact post spacing for your 13x19 Pro+ Manual Freestanding Pergola?
View 13x19 Manual Freestanding Post-to-Post Measurement Guide (PDF)