Steel Mast Spreader DetailsSPREADERS Spreaders are fabricated from steel sheet material of a configuration and thickness according to the plans. The tips of the spreaders have a slot to accommodate the upper shrouds that are held in place by a 1/4" s/s pin. The spreaders are continuously welded to the spreader doubler plates, which are then welded to the mast. A spreader compression post, consisting of four 1/2" steel pins, are inserted into holes drilled at the spreader and plug welded to the mast. They are needed to prevent the mast column from crushing due to the compressive forces of the upper shrouds.
Spreader Doublers similar to the doubler at the mast head are used to support the compressive forces of the spreaders. Doublers are also used under the spreaders where the lower shroud tangs attached to the mast.
Also shown in this drawing is the center divider used to help fabricate the mast column. Note the lighting holes which are used to reduce the weight of the center divider. The sail track and the sail track spacer are also shown in this drawing. From Spreader Details back to Steel Sailboat Mast Building |
Building the Bezier 12.5
The Bezier 12.5 is a 16 foot, classic styled aluminum daysailer being built right now.
You can follow it's progress on the button links below.
About the 12.5 Design
Design History
12.5 Archtictural Drawings
View drawings
PreFabrication:
Saw Cut
Longitudinal's
Roll Formed
Longitudinal's
Assembling
Transverse Frames
Transom
Transom Fabrication
Fabrication of
The Keel
Fabrication of
Assembly of
Hull Strongback
Fabrication of
Bezier Shell Plating
Fabrication of the Hull:
Framework
Construction
New! Plating the
True Round Hull Section
Part I
New! Plating the
True Round Hull Section
Part II
New! Welding the
True Round Section
Current Stage of Construction
Below:
