Nails placed in all holes guarantees full capacity. If the designer does not specify otherwise, always use full nailing.
Partial nailing can be used only if the designer clearly marked it in the specification. Number of nails in the secondary beam: Every second hole and the top and bottom holes of the hanger should always be nailed. (Unless otherwise specified) The number of nails in the main beam should be used for all holes near the bend of the joist hanger flange.Partial nailing is used in situations where it is not necessary to achieve a full load carrying capacity. Thanks to this type of installation we can reduce the number of nails in connection and thus reduce its cost as well as accelerate the assembly of the joist hangers.
When using Simpson Strong-Tie connectors in combination with reinforced concrete or steel, use anchor / bolts with suitable tensile strength Fax and shear Flat
Hanger BSNN 100 x 140, full nailing,
Biaxial load [K] = short term load ⇒ kmod = 0,8; γM = 1,3
Load F1,d = 12.3 kN; F3, d = 4.1 kN; nails CNA 4.0 x 50
R1,d = table value x kmod / = 27.1 x 0.8 / 1.3 = 16,7 kN
R3,d = table value x kmod / = 10.3 x 0.8 / 1.3 = 6,3 kN
Ultimate limit state: (12,3 / 16,7)2 + (4,1 / 6,3)2 = 0,97 ≤ 1⇒ ok
Hanger SDED440/30 + SDEG440/30 full nailing,
Biaxial load [K] short term load kmod = 0,8; γM = 1,3
Load F1, d =15,2 kN; F3, d = 5.3 kN
R1, d = table value x kmod / = 33,2 x 0,8 / 1,3 = 20,4 kN
R3, d = table value x kmod / = 14,0 x 0,8 / 1,3 = 8,6 kN
Ultimate limit state: (15,2 / 20,4)2 + (5,3 / 8,6)2 = 0,93 < 1 ⇒ ok
In addition to checking the ultimate limit state, the joist must be prevent against rotation on the support. To determine the required beam hanger, make sure that the sides in the beam hanger include at least 2/3 the height of the joist. It is acceptable to ignore this rule if the joist is secured against rotation in other way.
Beams with a cross section of 60 x 220mm, the minimum height of the joist hanger should be:
• 2/3 x 220 mm = 146, 66 mm.
The hangers that we can apply are: BSN60 / 160 and higher
TO PREVENT THE BEAM AGAINST ROTATION IN THE SUPPORT, THE HEIGHT OF THE JOIST HANGER SHOULD HAVE BEEN MINIMUM 2/3 OF THE JOIST
Connectors dedicated for I-beams are unique and special products.
The users have to pay special attention for notes and additional information included in the chapter. One of the most common misinstallation is improper fasteners selection. For standard solid connectors standard fasteners are 4,0 CNA nails. For I-beam products N3.75x30 square twisted and N3.75x75 smooth round nails have to be used. Usage of correct fasteners ensures proper installation and achieve published capacity. 4,0 CNA connector nails, unless noted otherwise, should not be used with the I-beam connectors to avoid I-beam flanges splitting.
This feature guides the nail into the joist and header at a 45° angle.
US Patent: 5,603,580.
Double Shear Nailing
The nail is installed into the joist and header,
distributing the loadthrough two points on each
joist nail for greater strength.
Positive Angle Nailing
Provided when timber splitting may occur and to reduce installation time.
Used to temporarily position and secure the connector for easier and faster installation.
Type of Nails holes
To fasten a connector. Always fill and make sure to use the correct nail.
Provide easier nailing access in tight locations. Fasteners installed at any angle
Optional holes to temporarily secure connectors to the member during installation
Sometimes provided in addition to round holes. Fill triangular holes when specified.
S 250 GD + Z275 g/m2 (20 μm)
Pre galvanized mild steel Sendzimir method
Sheet thickness: 1,2 – 4,0 mm
S 350 GD + Z275 g/m2 (20 μm)
Pre galvanized mild steel Sendzimir method
Sheet thickness: 1,5 mm
Nails & Screws to Stanard Joist Hangers
CNA nails and CSA screws have been specially developed for fixing Simpson Strong-Tie timber connectors. The conical extension of the stem under the head guarantees that the nail or screws fills the hole in the timber connector. Exact force transmission is therefore ensured.
Anchors to Joist Hanger
Chemical and mechanical anchors are characterized by fast assembly and high load capacity at short distances between anchors and short edge distances. They are mainly used for fastening in smooth and hard substrates, i.e. concrete, reinforced concrete, etc. The anchor is designed for fastening in the range of medium loads of building construction elements.
Nails to I-beam
Contrary to the basic product range where CNA4.0 connector nails are used, N3.75x30 square twisted nails and round N3.75x75 nails are used in I-beam. The use of these nails guarantees the correct execution of the connections and ensures that the declared capacity of the connection is maintained.
Please pay special attention to the additional information and notes in the product description. One of the more common mistakes made is the selection of incorrect nails. Do not use CNA4.0 ring nails, besides for a few exceptions.