Joist Hanger

Full Nailing

  • Gw_czesciowe

Nails placed in all holes guarantees full capacity. If the designer does not specify otherwise, always use full nailing.

Partial Nailing

  • Gw_pelne

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.

Anchoring

  • Kotwienie

When using Simpson Strong-Tie connectors in combination with reinforced concrete or steel, use anchor / bolts with suitable tensile strength Fax and shear Flat

Calculation Example

  • Sily_BSNN

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)+ (4,1 / 6,3)2 = 0,97 ≤ 1⇒ ok

  • Sily_SDEG

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

Beam Protection

  • monatz

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.

Example:
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

I-beam

  • iuse fig 1

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.

 

Correct connection

  • trou dome

Dome Nailing
This feature guides the nail into the joist and header at a 45° angle.
US Patent: 5,603,580.

  • clouage larde

Double Shear Nailing
The nail is installed into the joist and header,
distributing the loadthrough two points on each
joist nail for greater strength.

  • clou ang posi

Positive Angle Nailing
Provided when timber splitting may occur and to reduce installation time.

  • speed fix

Speed Prongs
Used to temporarily position and secure the connector for easier and faster installation. 

 

Type of Nails holes

  • 6 trou rond

Round Hole:
To fasten a connector. Always fill and make sure to use the correct nail.

 
  • oblong

Obround Hole: 
Provide easier nailing access in tight locations. Fasteners installed at any angle

  • 9 trou diam

Diamond Hole: 
Optional holes to temporarily secure connectors to the member during installation

 
  • triangle

Triangle Hole:
Sometimes provided in addition to round holes. Fill triangular holes when specified.