Hitools

BC Post Cap

Model: BC4Z

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Post caps connect tops of posts to members for a secure connection and are ideal for new or retrofit applications where structural support is needed. The BC Post Cap allows for the connection of 90mm or 140mm beam to post. Double-shear nailing between beam and post gives added strength.

Please check the Corrosion Information to see if it is suitable for your application.

Material

Carbon Steel 1.3mm thick

Finish

ZMAX^® Galvanised: BC4Z; BC6Z
316 Stainless Steel: BC4SS; BC6SS

Features & Benefits

Easy to install
Suits 90 mm square post and 90mm beam or 140mm square post and 140mm beam
Stronger than toenailing or screw fastening
Reduces the chance of the post splitting and eliminates nailing into end grain
Great for use on patios and decks
Compatible with Strong-Drive®SD Connector Screws
Available in 316 Stainless Steel for more corrosive environments such as coastal areas

Installation

Use all specified fasteners
Do not install bolts into pilot holes
Install with 64mm x 3.75mm nails or Strong-Drive^®SD Connector Screws
Post bases do not provide adequate resistance to prevent members
from rotating about the base and therefore are not recommended for non-top-supported installations (such as fences or unbraced carports)
To tie multiple 2x members together, the Designer must determine the fasteners required to join members to act as one unit without splitting the wood

Model No. Table

Model No.	Dimensions (mm)						Fasteners (No. – Length x Dia., mm)		Australia		New Zealand
Model No.	W1	W2	L1	L2	H1	H2	Beam Flange	Post Flange	Uplift k1 = 1.14	Lateral k1 = 1.14	Uplift k1 = 1.0	Lateral k1 = 1.0
BC4Z	90	90	73	73	76	76	6 – 64x3.75	3.8	4.1	3.8	4.1
BC4SS	90	90	73	73	76	76	6 – 64x3.75 SCNR	3.8	4.1	3.8	4.1	6 – 64x3.75 SCNR
BC6Z	140	140	111	111	86	86	12 – 64x3.75	12 – 64x3.75	4.4	8.7	4.4	8.7
BC6SS	140	140	111	111	86	86	12 – 64x3.75 SCNR	12 – 64x3.75 SCNR	4.4	8.7	4.4	8.7

Design Capacity is the lesser of (1) the Characteristic Capacity multiplied by the Australian Capacity Factor, or the NZ Strength Reduction Factor (φ), and applicable the k modification factors following AS 1720.1 and NZS 3603 and (2) the Serviceability Capacity which is the load at 3.2 mm joint slip. Design Capacity is the minimum of test data and structural joint calculation
For Australia, the Capacity Factor (φ) is 0.85 for nails and screws for structural joints in a Category 1 application. Reduce tabulated values where other Category applications govern. For NZ, the Strength Reduction Factor (f) is 0.80 for nails in lateral loading.
Duration of Load Factor (k1) is as shown. Reduce Duration of Load Factor where applicable. Capacities may not be increased.
Timber species for joint design is seasoned Radiata Pine, which is Australia Joint Group JD4 per AS 1720.1 Table H2.4 and New Zealand Joint Group J5 per NZS 3603 Table 4.1.
Allowable loads have been increased for wind or earthquake with no further increase allowed; reduce where other loads govern.
Structural composite timber columns have sides that show either the wide face or the edges of the timber strands/veneers. Values in the tables reflect installation into the wide face.
Base design loads assumes nails have full penetration into supporting member. Loads do not apply to end grain post installations.
Simpson Strong-Tie® SCNR Ring Shank 64x3.75 mm nails shall be used with the BCSS models.
The Design Capacities shall be multiplied by 1.10 when 75 x 3.75 mm nails are used instead of the specified 64 x 3.75 mm nails.
Post and beam may consist of multiple members provided they are connected independently of the post cap fasteners.
Nails and Strong-Drive SD Connector screws may not be combined in a connection.

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