Simpson Strong-Tie PBP60/50 Steel Post Base – For Pergolas & Porch Posts
Durable, Adjustable Support for Timber Posts in Outdoor Structures
Engineered for Versatility in Timber Construction
The Simpson Strong-Tie PBP60/50 post base is a high-performance connector designed for external timber structures such as pergolas and porch roofs. This patented steel bracket ensures reliable support while maintaining a minimal profile between the post and concrete base. It accommodates a wide range of timber post sizes and supports both structural and aesthetic applications.
Key Product Features
Robust Steel Construction
• Made from S235JR steel (EN 10025)
• Sherardised Class C30 finish (EN ISO 17668) for long-term outdoor durability
Adjustable Post Compatibility
• Suitable for square timber posts from 70 mm to 150 mm (use in pairs)
• For larger posts up to 250 mm x 250 mm, use four post bases per post
Compact & Efficient Design
• 50 mm standoff distance reduces exposure to ground moisture
• 3 mm steel plate ensures strong yet slimline profile
External Use Ready
• Rated for Service Class 3, ideal for outdoor or exposed environments
• Fully compatible with solid timber, composite timber, and Glulam posts
Benefits
• Supports versatile post sizes for flexible design use
• Ensures moisture protection by elevating timber above the concrete base
• Quick visual installation with clear fixing points
• Designed for concrete anchoring, with options for both mechanical and chemical fixings
Typical Applications
• Structural support for pergolas, verandahs, and porch roofs
• Timber post connections in residential landscapes or exterior architecture
• Suitable for open-sided constructions with defined post spacing
Product Dimensions
| References |
Product dimensions [mm] |
Top plate holes |
Bottom plate holes |
| A |
B |
C |
D |
F |
t |
Ø5 |
Ø13 |
Ø12x25 |
| PBP60/50 |
35 |
60 |
140 |
62 |
49 |
3 |
7 |
2 |
1 |
PRODUCT SIMPLIFIED CHARACTERISIC CAPACITIES - 2 POST BASES
| References |
Product capacities - Timber to Concrete - 2 post bases |
| Fasteners |
Characteristic capacities - Timber C24 [kN] |
| On post |
On concrete |
R1.k*
|
R2.k*
|
| Qty |
Type |
Qty |
Type |
| PBP60/50 |
4 |
Ø12x50 |
2 |
Ø10** |
40 |
11.9 |
* The published characteristic capacity is based on medium term load duration and service class 3 according to EC5 (EN 1995) (kmod = 0.7). For other load duration and service class, please refer to the ETA to get more accurate capacities ** Refer to the Simpson Strong-Tie anchor product range for suitable anchors. Typical anchor solutions are AT-HP, depending on the concrete type, spacing and edge distances.
PRODUCT SIMPLIFIED CHARACTERISIC CAPACITIES - 4 POST BASES
Load Capacities – Timber to Concrete (C24 Timber)
Using 2 Post Bases
• On Post: 4 × Ø12 x 50 mm
• On Concrete: 2 × Ø10 mm
• R1.k: 40 kN
• R2.k: 11.9 kN
Using 4 Post Bases
• On Post: 8 × Ø12 x 50 mm
• On Concrete: 4 × Ø10 mm
• R1.k: 90 kN
• R2.k: 11.9 kN
Note: Capacities based on medium-term load duration, Service Class 3, per EC5 (EN 1995). Consult ETA for variations in conditions.
* The published characteristic capacity is based on medium term load duration and service class 3 according to EC5 (EN 1995) (kmod = 0.7). For other load duration and service class, please refer to the ETA to get more accurate capacities ** Refer to the Simpson Strong-Tie anchor product range for suitable anchors. Typical anchor solutions are BOAXII, SET-XP, WA, AT-HP, depending on the concrete type, spacing and edge distances.
INSTALLATION
Fixing
On post : CNA Ø4.0x50 mm nails or CSA Ø5.0x50 mm screws Wood screws or bolts Ø12 mm On concrete : Mechanical anchor : WA M10-78/5 Chemical anchor : AT-HP resin + threaded rod LMAS M10-120/25
Installation
- Can be used with different post sizes
- 50mm standoff
- Order as separate item, use in pairs
- Not recommended when the top of post/column is not restrained (e.g. fence post)
Step 1: Measure positions and bolt down to floor with appropriate fixing (M10), ensuring the post bases are parellel to one another. (Length of fixing to be advised by structural engineer). Step 2: Lower the post onto the post bases (2 or 4) ensuring they are aligned with the centre of the post. Step 3: Install CNA4.0x50 nails into the timber as shown, CSA 5.0x50 screws can also be used as an alternative.
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