1

H OW T O B UILD
a Wooden Dock System
Congratulations on choosing
Multinautic's® Quality Dock
Hardware. A well assembled
dock system will bring you
many years of enjoyment.
Make sure to always use &
wear the proper personal
protection in order to work
securely. Never use electrical tools near water...We
want you safe & sound to
enjoy your dock for a long
time... You can find many
other useful tips on our Web
Site to help you achieve the
project you want.
Floating
ON ANY DOCK SIZE OR MODEL, THE FOLLOWING STEPS APPLY:
1. Make YOUR "Layout Plan" in order to visualize all the material you
will need to do the job (see the examples below.)
2. If you want to change the sizes, just change the proposed
lenghts accordingly. Check on web site for more plans.
3. For a floating dock system, look at “ANCHORING SUGGESTIONS”,
on the back, to get and install everything needed.
Semi-floating
Stationary
INSIDE JOIST
LUMBER
Frame Sides
Inside Joists
End Pieces
Decking
Float Supports
Screws
8’ x 12‘ FLOATING
2” x 6” x 144”
2
2” x 6” x 140 ¾"
2
2" x 6" x 92 ¾"
2
2" x 6" x 96” (8’)
24
2" x 6" x 96” (8’)
6
256
4’ x 12‘ SEMI-FLOATING
2” x 6” x 144”
2
2” x 6” x 140 ¾"
1
2" x 6" x 44 ¾"
2
2" x 6" x 48"
24
2" x 6" x 48"
4
180
4’ X 10’ STATIONARY
2” x 6” x 120”
2
2” x 6” x 116 ¾"
1
2" x 6" x 44 ¾"
2
2" x 6" x 48"
20
-132
LAYOUT PLAN EXAMPLE
For an optimal strength and assembling ease, we recommend that you use the same part numbers
or same thickness or size, throughout project. Always use galvanized bolts, nuts & washers:
3⁄8” x 2 ½” for 7⁄16” holes; ½” x 3” for 9⁄16” holes.
4’ x 10’ Stationary
2” x 6” ou 2” x 8” Qty
inside corner
10001 11001
4
Back plate
10010 11002
4
Leg holder
10011 11004
2
Base plate
or 11107
2
Hinge
13303 11003
2
6’ or 8’ post & PVC cap
2
inside corner
10002 même
2
Back plate
10003 même
4
depending on part types
Bolts & nuts
4’ x 10’
1
A
C
B
Mount the dock upside down on a flat surface in order to easily
install floats. The boards need to be flush on the bottom side to
install decking properly in last step. Lay down boards, best side out,
and screw together. The screws should not be aligned with holes
you will make for hardware (A). Check squareness by measuring in
“X” from corner to corner (+/- ¼") (B). You can lock the position by
screwing down a diagonal piece temporarely on the frame (C).
4’ x 12’ Semi-Floating
Inside corner
Back plate
Hinge
Inside corner
Back plate
Bolts & nuts
2” x 6” ou 2” x 8” Qty
10006 11001 4
10010 11002 4
13303 11003 2
(for joist)
10002
2
10003
4
depending on part types
4’ x 12’
2
Starting with corners, align parts, mark holes with a pen, drill,
then install hardware with bolts. Note that parts may vary from
the drawing.
8’ x 12’ Floating
NUT
LOCK WASHER
FLAT WASHER
FLOAT
FLOAT SUPPORT
CARRIAGE BOLT
Qty
Inside corner
6
Anchor chain holder
2
Back plate
10
Inside corner
(for joists)
2
Back plate
4
depending on part types
Bolts & nuts
Accessories
Qty
Cleat & cleat bracket
4
Corner bumper
4
PVC Bumper
24 ft
Float (qty depends on model) 6 or 8
Bolts, flat washers, lock washers & nuts
(depending on float size & qty)
Ladder
3
For a floating dock section, spread 2” x 6” float supports and floats
evenly on the frame (to evaluate where they will be installed). Mark
the frame and supports (for bolts) accordingly. Remove floats and
screw on the support boards. Bolt on floats to the supports.
1
Anchoring
Qty
Galv. chain 5⁄16”
Shackles
Concrete deadman
(minimum 1’ x 1’ , 125 lbs)
Opti
to st onal cor
reng
then ners & p
struc
l
ture ates
+/- 50 ft
2
4
4
You will need help to flip the structure over to avoid any back
injuries. Carefully flip the structure top side up. Lay down, space
and screw on decking planks along each side and inside joists.
Before you proceed with this step, confirm squareness again.
First, look around at your neighbor’s docks and if they have been there for many years and standing well, a similar
choice may be good for you. A STATIONARY DOCK should not be installed in a depth of more than 4’ because you’re
going to have water over your head during installation. A stationary dock is perfect in shallow waters (think about the
water level that can drop during the season). Where you have big fluctuations of the water level, you may start with
stationary docks and add floating ones in deeper area. A stationary dock is not designed to withstand lateral pressure
that can be caused by a boat moored beside it. It is suggested to moor the boat with concrete blocks and ropes.
A FLOATING DOCK SYSTEM absolutely needs an anchoring system at the end of it, and at every +/- 30 feet. Get some: anchor chain
holders, anchoring blocks or concrete deadmen, chains, shackles and/or pile guides (or multi-anchoring leg holders).
The following formula enables you to determine an average of FLOATATION for a dock
“Basic” :
20 lbs / sq.ft
“Good” :
25 lbs / sq.ft
“Commercial” type : 30 lbs + up / sq.ft
+/- 13"
+/- 17"
+/- 20"
Floats’ Height
& Buoyancy Capacity
8” / 370 lbs
12” / 450 lbs
16” / 600 lbs
* FreeBoard:
height of dock
above waterline
(the example below
is calculated with
an average of 25 lbs)
© copyright Multinautic® 2010
Free Board *
BUOYANCY (average per square foot)
1 - Area of an 8' x 12' dock :
8 ft x 12 ft = 96 sq.ft
96 ft x 25 lbs / sq.ft = 2400 lbs
2 - Multiply area sq.ft by average sq.ft buoyancy :
3
Round up to the pair
4 - To confirm the accuracy of your answer...take the total of floats you plan on installing (6) multiplied by its capacity (6 x 370= 2220 lbs of buoyancy)
divided by the area of dock : 2220 lbs ÷ 96 sq. ft. =23.125 lbs will be the total buoyancy capacity of the dock to which you need to deduct the weight of
the dock itself in order to get the net total floatation capacity...ouf!
5 - Make sure you can fit them all under your dock! (size may vary)
ANCHORING SUGGESTIONS
Front views
FLOATING
DOCKS
LEG PILES MUST EXCEED by
24” or more depending on water
fluctuations & wave movements.
Install floats in a river
this way
LEG PILE 8’
PILE GUIDE
TO BE USED IN 4’
OF WATER OR LESS
TIPS of
POUND PILES MINIMUM 1 FT INTO
THE GROUND (2 ft if a boat will be
moored to the dock)
the PROS
Float supports should be installed perpendicularely to dock lenght. Strenghten sections by
adding inside joist corners and back plates to
float supports.
See step 3
on the other side
To add strenght to a floating dock
section, you may add diagonal wooden
braces in the 4 corners as shown, in
which you will screw on decking.
ft.
TO BE USED IN 4’
OF WATER OR MORE
You may want to add a finishing touch by
adding a piece of wood and/or
installing bumpers to complete edging.
SUGGESTED LENGHT
OF CHAIN =
2 TO 3 TIMES THE
DEPTH OF WATER
CONCRETE DEADMAN
GALVANIZED CHAIN SIZE
= 5/16” to 3/8”
ANCHOR CHAIN HOLDERS
STATIONARY
DOCKS
FIXED DOCK -SMOOTH SHORELINE INSTALLATION
(in ROUGH WATER or
STRONG CURRENTS)
LEG BRACE
ADDITION OF A
DIAGONAL LEG BRACE
POUND PILES AT LEAST 6 in.
INTO THE GROUND
or / and
ANCHOR CHAIN HOLDER
Multi-Anchoring
Leg Holder
FIXED DOCK -STEEP SHORELINE INSTALLATION
Easier to install this way
Anchor Chain Plate
ANCHORAGE
( ALLOWS TEMPORARY
MOORING )
15º max.
OPTIONAL
GALVANIZED CHAIN
SHACKLES
CONCRETE
DEADMAN
Anchor Chain Corner
1.800.585.1237
All information included in those pages are uniquely as a rough guide. Multinautic® or any person consulted using the references of this flyer or web site cannot be held responsible for consequences that could occur following the use of those products or informations.