Technical Specifications

E8879.01-119-19
Page 6 of 15
4.2 Series / Model
The test specimen components were supplied by Fortress Railing Products and were assembled
by a representative of Intertek-ATI.
Top/Bottom Rail: 1.30 in wide by 1.30 in high by 0.11 in wall "U"-shaped extruded 6063-T5
aluminum profile
Top Rail Cap: 1.45 in wide by 1.37 in high by 0.07 in wall "U"-shaped extruded 6063-T5
aluminum profile
Straight Brackets: 1.91 in wide by 1.62 in high by 1.26 in deep (0.20 in wall) cast aluminum
cup bracket
Pickets: 0.63 in square by 0.05 in wall by 31 in long extruded 6063-T5 aluminum with
3.88 in clear space between pickets - pickets have welded connection points to
top and bottom rails
Support Posts:
Post: 2.5 in square by 0.16 in wall, 6063-T5 aluminum tube post welded to nominal
4.25 in square by 0.40 in thick base plate with four nominal 3/8 in diameter
holes located approximately 15/32 in on-center in from each edge and
approximately 3-5/16 in apart on-center and one 3/4 in diameter hole located
in the center of the base plate - a 1/4 in continuous fillet weld connected the
tube to the base plate - the base plate was attached to the surface of a rigid
steel test surface (simulated concrete) as described in Section 4.4 Fastening
Schedule.
Wood Post: Nominal 4x4 preservative treated, Grade No. 2, Southern Pine wood post
in rigid vertical stanchions
Support Block: 0.83 in square by 4.15 in long cast aluminum tube with integral 1.02 in by
0.83 in by 0.56 in high “U” profile at top end
See drawings in Appendix A and photographs in Appendix B for additional details.
4.3 Fastening Schedule
Connection
Fastener
Rail Bracket to Aluminum
Post*
Two #12-24 by 3/4 in flat-head, star drive,
Type F thread cutting tip, sheet metal screws
Rail Bracket to Wood Post
Two #12-10 by 2-1/2 in (0.157 in minor diameter)
Type A point, flat-head, star drive, wood screws
Rail Bracket to Rail**
One #12-24 by 3/4 in flat-head, star drive,
Type F thread cutting tip, sheet metal screws
Support Block to Bottom Rail
Slip fit - No mechanical connection
Post Mount to Substructure
Four 3/8 in Grade 5 hex-head bolts with washer
* 3/16 in diameter pre-drill used
** 3/16 in diameter pre-drill used, fastener located on the protected side of the rail