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Information on this website reflects changes in the allowable loads and configurations of some Simpson Strong-Tie® products. It is effective until 29th February 2007 and supersedes all information in earlier publications of products shown. Information on safe working loads and configurations is updated periodically. After 29th February 2004, contact Simpson Strong-Tie® for the most current product information. Allowable loads shown are for the described specific applications of properly-installed products. Product modifications, improper loading or installation procedures, or deviations from recommended applications will affect connector allowable load-carrying capacities.
These notes are provided to ensure proper installation of Simpson Strong-Tie® products and must be followed fully.
a. Simpson Strong-Tie® reserves the right to change specifications, designs, and models without notice.
b. Steel used for each Simpson Strong-Tie® product is individually selected based on the product's steel specifications, including strength, thickness, formability, finish, and weldability. Contact factory for steel information on specific products.
c. Unless otherwise noted, dimensions are in millimetres (mm) and loads and downloads in kilo Newtons (kN).
d. Unless otherwise noted, allowable loads are for use with C16 (SC3) timber. Products assessed in the USA were evaluated with Spruce-Pine-Fir timber.
e. Unless otherwise noted, bending steel on site may cause fractures at the bend line. Fractured steel will not carry the load and must be replaced. Products designed for bending at time of installation should only be bent once.
f. A fastener that splits timber will not take the design load. Evaluate splits to determine if the connection will perform as required. Dry wood may split more easily and should be evaluated as required. If wood tends to split, consider pre-boring holes with diameters not exceeding 75% of the nail diameter.
g. Timber shrinks and expands as it loses and gains moisture, particularly perpendicular to grain.
h. Take wood shrinkage into account when designing and installing connections. Simpson manufacturers products to fit common dry timber dimensions other than those listed. Simpson may be able to vary connector dimensions: contact the factory.
i. Top flange hangers may cause unevenness. Possible remedies should be evaluated by a professional and include using a face-fixing hanger or removing material to accommodate the top flange thickness.
j. Multiple member timbers must be fastened together to act as one unit to resist the applied load.
k. Do Not Overload. Do not exceed the safe working load (SWL) which would jeopardise the connection.
l. Some model configurations may differ from illustrations shown. Contact factory for details.
m. Fill all fastener holes with fastener types specified in the tables, unless otherwise noted. When nailing options are noted, the fasteners must be the correct type and location to obtain full loading.
n. Hanger options - some combinations of hanger options have not been evaluated. In some cases, combinations of these options my not be installable. Horizontal loads induced by sloped joists must be resisted by other members in the structural system. A qualified designer must always evaluate each connection, including the carried and carrying member limitations, before specifying the product.
o. All references to bolts are for structural quality through bolts. Bolts to conform to BS EN 20898-1 and washers to BS4320.
Instructions to the installer a. All specified fasteners must be installed according to the instructions for each connector. Incorrect fastener quantity, size, type, material, or finish may cause the connection to fail.
b. Install all specified fasteners before loading the connection.
c. Pneumatic or power-actuated fasteners may deflect and injure the operator or others. Nail guns may be used to install connectors, provided the correct number and type of nails are properly installed in the holes provided.
d. Guns with hole locators should be used. Follow the manufacturer's instructions and use the appropriate safety equipment.
e. Masonry supported connectors must be embedded into correct strength mortar per British Standard.
f. Hangers into masonry walls must have the minimum specified height of masonry above the hanger, with the mortar fully cured, before load is applied. Top flange masonry hangers will not carry the design load without specified masonry above the top flange of the hanger.
g. Protruding nails should always be clinched to avoid injury.
Instructions to the designer
a. The Safe Working Loads (SWL) shown in the Simpson Strong-Tie® publications for the United Kingdom are derived from tests, calculation and assessments performed in the UK and the USA.
b. The Safe Working Loads for timber-to-timber hangers showing the BM TRADA Certification Q-Mark are based on testing and analysis carried out by TRADA Technology Ltd. (TTL). This work was conducted using the methods and criteria developed by TTL under a joint Government/Industry sponsored research project intended to develop a British Standard method of characterising the performance of timber-to-timber hangers.
c. SAFE WORKING LOADS (SWL) are presented for use in permissible stress design in accordance with BS 4268: Part 2: 2002 for Service Classes 1 and 2.
d. Loads from Germany were in accordance to DIN design criteria and test assessment required for Zulassung by the institute für Bautechnique.
e. Some products in this catalogue are designed, tested and evaluated in accordance with U.S. Industry standards including: 1997 National Design Standards: BOCA, Building Officials and Code Administrators International, Inc.; and others. All Safe Working Loads (SWL) are determined with the use of data obtained through product load testing to destruction (except for straight straps). The SWL is limited by the breaking strength divided by 3 or the load at which carried member reaches 3mm deflection with respect to the carrying member.
f. Wood shear is not considered in the loads given; reduce allowable loads when wood shear is limiting.
g. Simpson Strong-Tie® strongly recommends the following addition to construction drawings and specifications: 'Substitutions for Simpson Strong-Tie® products must be approved in writing by the designer'.
h. Verify that the dimensions of the supporting members are sufficient to receive the specified fasteners.
i. Some illustrations on the website show connections that could cause cross grain tension or bending of timber if not sufficiently reinforced. In this case, mechanical reinforcement should be considered.
Corrosion resistance
Connectors are steel and will corrode and lose load-carrying capacity if exposed to ocean salt air, corrosive fire-retardant chemicals, fertilisers, or other substances that adversely affect steel.
In corrosive environments, especially for connectors that are not exposed to rain or periodic washing, deterioration will occur at a faster rate. The service life of galvanised connectors in a temperate marine environment can be greatly improved by homeowner maintenance. Fasteners of comparable material should be used to install the product.
Pressure-preservative treated and fire-retardant wood can be caustic to zinc coated (or galvanised) steel. Galvanised connectors should not be placed in contact with treated wood that has not been properly air-seasoned or properly kiln dried. See material supplier for specific recommendations.
TERMS AND CONDITIONS OF SALE :
Product use
Products on this site are designed and manufactured for the specific purposes shown, and should not be used with other fixings not approved by a qualified designer. Modifications to products or changes in installation procedures should only be made by a qualified designer. The performance of such modified products or altered installation procedures is the sole responsibility of the designer.
Indemnity
The Buyer's shall indemnify Simpson Strong-Tie against any claim or liability in respect of any infringement of a patent or registered design, copyright or other industrial property resulting from compliance with the Buyer's instructions, express or implied, and the Buyer undertakes further to indemnify the Simpson Strong-Tie for any loss, damage or expense in respect of any liability arising under or by reason of the provisions of the Consumer Protection Act 1987 in relation to the specification or design of such goods or any similar legislation in any other country in which the goods are supplied.
Non-catalogue and modified products
Consult Simpson Strong-Tie for applications requiring modified products, or for fixings for use in hostile environments, with excessive wood shrinkage, or with abnormal loading or erection requirements. Non-catalogue products must be designed by the customer and will be fabricated by Simpson Strong-Tie in accordance with the customer specifications. Simpson Strong-Tie cannot and does not make any representations regarding the suitability of use or load-carrying capacities of non-catalogue products. Simpson Strong-Tie provides no warranty, express or implied, on non catalogue products. Any party modifying Simpson Strong-Tie products must provide the installer with specific instructions on the modified product's specifications, installation, and use.
Limited warranty
Simpson Strong-Tie warrants catalogue products to be free from defects in material or manufacturing. Simpson Strong-Tie products are further warranted for adequacy of design when used in accordance with design limits in this catalogue, and properly specified and installed. This warranty does not apply to uses not in compliance with specific applications and installation procedures set forth in this catalogue, or to non-catalogue or modified products. In the event of any goods proving defective be reason of faulty or incorrect design, workmanship, parts or materials, the Simpson Strong-Tie's liability is limited to replacing or repairing the goods, or at the Simpson Strong-Tie's option, crediting the value of the goods at the invoiced price.
In the event of an error in any dimension, capacity, performance or other description or information which has formed a representation or is a part of a contract, Simpson Strong-Tie's liability in respect of any direct loss or damage sustained by the Buyer as a result of such error shall not exceed the price of the goods in respect of which the description or information is incorrect.
Simpson Strong-Tie will only be liable to the Buyer in respect of the matters set out in the above two paragraphs provided that the Buyer has given notice of the defect as soon as reasonably possible and shall have either returned the goods to Simpson Strong-Tie at Simpson Strong-tie's expense or provided authority for Simpson Strong-Tie's servants, or agents to inspect them.
Save as provided in these conditions Simpson Strong-Tie shall have no further liability in respect of any direct or consequential loss or damage sustained by the Buyer arising from connection with any defect or error as aforesaid.
Except for the terms implied in the contract by section 12 of the Sale of Goods Act 1979 all conditions, warranties and other terms, express or implied statutory or otherwise, are expressly excluded, save insofar as they are contained in these conditions or otherwise expressly agreed by Simpson Strong-Tie in writing. If any legislation shall make it unlawful to exclude any term from the contract the foregoing provision will not apply to any such term.
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