Spars, Rigging, and Hardware for Sailboats

Rig-Rite, Inc.
 Phone: (001) 401-739-1140 -- FAX: (001) 401-739-1149
www.RigRite.com          Ordering/Questions

Isomat Booms
Listed below are the most common Isomat Boom Sections. Original Isomat Booms are easily identifiable by their angularity (they are essentially Octagonal, and hard chined), and an integral internal flat track on the bottom for special Boom Bails. Later Isomat Boom Sections had smooth sides and an integral internal flat track on the bottom. For parts for them please contact us with details including maximum Outside Dimensions of the Boom Section. 

For replacement Boom Parts, determine which Boom Section you have by measuring maximum Outside Dimensions.
Click on individual Boom Sections, below, to see hardware commonly used with those Sections.

See also Isomat Mast Sections and Components.
And Isovang Solid Vang and Components.

Isomat Boom Sections
Cross-Section
(typical)		 Section # Maximum Outside Dimensions
(Height x Width)

Wall Thickness

Weight (lbs./ft)

 Moments of Inertia
Ixx           Iyy
(in4)          (in4)

NB-32 Boom Section

 NB-16 2 7/8" x 3 1/2" (72mm x 90mm) .065" 1.08 1.11 1.06
NB-26 4" x 3 1/2" (100mm x 90mm) .092" 1.76 2.48 2.07
           
NB-32 5" x 4 3/8" (128mm x 110mm) .085" 2.16 7.04 3.96
NB-40 5 7/8" x 4 3/8" (150mm x 110mm) .110" 2.71 11.22 4.97
NB-55 7" x 5 1/8" (180mm x 130mm) .140" 3.72 20.42 6.97

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