Installation Guide

Fortress Deck has developed a range of fasteners that are specially designed to securely fasten the deck boards to a substructure.
The coating employed for our HULKTM fasteners ensure the fixing system supports your deck through out its lifespan.
9. Fasteners
Appropriate fasteners must be employed depending on the expected worst-case loading conditions, the intended application and
the conditions present. Particular attention should be paid to the substrate conditions available and the environmental conditions
of the site. All applications should adhere to applicable building coads. All wood profiles should be treated appropriately. Regular
and proactive maintenance should be employed.
*Pull out resistance range is based on testing with fasteners in ACQ wood (density of 0.67 g/cm³) to Red oak wood (density of
0.72 g/cm³).
Typical deck fastener used in metal frame application
Fastener type Standard
size
Length
(mm)
Material Pull out
resistance (N)*
Note
Hidden fastener(Clip)
N/A SS 430 N/A
Two sizes available for use in
a 6 mm (S6) and 9mm (S9)
groove height.
Hidden clip fastener
M4.2 40
C 1022 3 850 Designed for both S6 and S9
Hulk hidden deck
fasteners.
SS 410 H 4 030
Surface Mount deck screw
M5.0 45 C 1022 3 470
Designed for boards up to 1"
thick into metal structures 19
gauge to 14 gauge thick.
Fascia/Trim screw
M5.5 35
10B21 5 717
Designed for boards up to 1"
thick into metal structures 19
gauge to 14 gauge thick.
SS 410 H 6 138
Appropriate fasteners must be employed depending on the expected worst-case loading conditions, the intended
application and the conditions present. Particular attention should be paid to the substrate conditions available
and the environmental conditions of the site. All applications should adhere to applicable building coads. All metals
should be appropriately coated. Regular and proactive maintenance should be employed.
*Pull out resistance is based on testing with fasteners into 14 gauge steel plate with a hardness of HV146.
10
Apex
TM
Deck Installation Guidelines
Typical deck fastener used in timber frame application
Fastener type Standard
size
Length
(mm)
Material Pull out
resistance (N)*
Note
Hidden fastener: Clip
N/A SS 430 N/A
Two sizes available for use
with boards that have 6 mm
(S6) or 9 mm (S9) groove
heights.
Hidden clip fastener: Screw
M4.2 40
C 1022 4 400 to 6 250 Designed for both S6 and
S9 Hulk hidden deck
fasteners.
SS 305 3 900 to 4 500
Surface Mount deck screw
M5.0 63
C 1022 7 150 to 9 900
Designed for boards up to
1" thick into wood
structures greater than
1½" thick.
SS 305 5 550 to 6 900
Fascia/Trim screw
M5.5 48
10B21 4 550 to 7 150
Designed for boards up to
¾" thick into wood
structures greater than
1½" thick.
SS 316 5 000 to 6 500