Fix or Adjustable Bracket Installation

BRACKET WITH SET SCREWS

 

The pile cap (fixed or adjustable) must directly bear on the shaft below. The 4 set screws shall be torqued with a minimum of 15 ft-lb of torque using a hexagonal key. For adjustable cap, a fifth set screw shall be torqued to prevent lateral movement of the threaded rod.

 

BRACKET WITH SELF-DRILLING SCREWS

 

The sleeve of the pile cap (fixed or adjustable) is attached to the shaft of the pile using self-drilling screws (a minimum of two (2) or three (3) screws is required, see below). Techno Metal Post recommends using the following product or equivalent:

  • UCAN (model TRH 12114K5) self-drilling screws (or any equivalent brand);
  • size 12-24;
  • length 1.25” (32 mm);
  • drill point #5 in galvanized steel.

The allowable uplift resistance values (lb) between the pile cap and the pile attained during the laboratory test.

UCAN Self-drilling Screws
Allowable uplift resistance (lb) between the pile cap and the pile

Screw size

Point

Resistance for 2 screws

Resistance for 3 screws

Resistance for 4 screws

12-24

#5

2 000 lb

3 000 lb

4 000 lb

Please note that for decks and additions, we recommend using a minimum of 2 self-drilling screws. For piles supporting a structure with a roof with no floor (carport, pergola, etc.), we recommend using 3 self-drilling screws minimum. The connection of the supported member may limit uplift capacity.

The use of adjustable pile cap must be avoided for free-standing structures and structures with a roof (carport, pergola, etc.) given the presence of greater lateral and uplift loads.