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Dock Specification Guidelines
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General
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All docks must be constructed so they meet or exceed the following specifications. This section also may be used as a minimum structural standard for breakwaters; however, all breakwater designs must include engineering certification as to structure durability and effectiveness for the lake location. Alternate structure designs that meet or exceed the following specifications will be considered if the plans are sealed by a Registered Professional Engineer.
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Certified Dock Builders
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All docks and breakwaters, including additions, modifications, and refoaming activities must be completed by a Certified Dock Builder or the owner of the property where the structure is located. AmerenUE will maintain and periodically update a Certified Dock Builder list. Certified Dock Builders must meet the following minimum standards:
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1. Possess a valid AmerenUE permit prior to commencing construction on any structure on Lake of the Ozarks.
2. Provide proof of commercial liability insurance of not less than $1,000,000 with AmerenUE listed as additionally insured.
3. Proof of worker’s compensation insurance and employer’s liability insurance with limits no less than $500,000, and as provided by state law.
4. Provide an affidavit or proof of proper disposal of waste foam and materials.
5. Pass an initial certification inspection and random inspections thereafter.
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Specific Provisions
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1. No habitable structures will be permitted on boat docks.
2. All construction or modifications of small docks (4 slips or less) shall have the plans, applications and drawings submitted by a Certified Dock Builder or individual experienced in floating dock design or construction. All construction shall conform to the specifications outlined below.
3. All construction or modifications of large docks (more than 4 slips) and all breakwater structures must have the plans, specifications, and required calculations submitted and signed by a Registered Professional Engineer experienced in floating dock design for commercial docks or marinas with boat size, wind conditions, and anchorage design equal to or greater than the design being submitted.
4. The Americans with Disabilities Act (ADA) or any related standard is not addressed in these specifications. The accessibility requirements provided in these specifications are not intended to comply with ADA or any related standards. The dock owner shall bear full responsibility for any ADA requirements.
5. American Society of Civil Engineers (ASCE) Manuals and Reports on Engineering Practice No. 50, Planning and Design Guidelines for Small Craft Harbors, is a recognized standard and may be used along with the requirements herein. The requirements provided in this specification shall govern over the ASCE No. 50 standard.
In extreme situations, emergency temporary repairs may be completed to ensure the safety of private property and persons. Such temporary repairs must meet all federal, state, and local requirements and be reported to AmerenUE’s Shoreline Management office within 48 hours of the repair.
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Flotation
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1. Only AmerenUE approved encapsulated flotation may be installed at Lake of the Ozarks. See the list of approved encapsulated floatation manufacturers. AmerenUE will maintain, and periodically update, a list of approved flotation manufacturers for distribution to Certified Dock Builders and interested property owners.
2. A “Float Replacement Notice” to Ameren will be required for any flotation replacement. Proof of appropriate waste foam and/or debris disposal is required.
3. Flotation shall be made up of a flotation material and an encasement around the flotation material. The use of new or recycled plastic or metal drums for encasement or floats is prohibited.
4. Flotation material shall be extruded polystyrene, expanded polystyrene, or a copolymer of polyethylene and polystyrene. Flotation material shall have a minimum density of 0.8 lbs./cu. ft., be of consistent quality throughout the float, beads shall be firmly fused together, and there shall be no voids inside the encasement.
5. Flotation material shall have a water absorption of less than 3.0 lbs./cu. ft. at 7 days when tested by “The Hunt Absorption Test.” The float being used must be certified to meet this test either by a statement in the float manufacturer's literature or by a letter signed by the president of the float manufacturing company. Certification must also contain a statement which guarantees the minimum thickness of the encasement.
6. The encasement shall be solid polyethylene or a polyurethane type coating, both of which shall be watertight and have a minimum thickness of 0.125 inches. All floats shall be warranted for a minimum of eight years against sinking, becoming waterlogged, cracking, peeling, fragmenting, and losing beads and shall not be subject to damage by animals. A copy of the manufacturer's warranty shall be included with the certification of water absorption and encasement thickness. Existing floats that become inadequate to carry the existing design loads shall be replaced with totally encapsulated floats meeting these new requirements and outlined on the AmerenUE approved flotation list. If floats furnished under this new specification become punctured exposing the foam to erosion or deterioration, they shall be replaced immediately.
7. AmerenUE reserves the right to field-test any float to assure compliance with these float requirements. All flotation manufacturers are subject to annual and random testing. Floats will be tested by an independent testing source at the manufacturer’s cost.
8. A float manufacturer that believes it has floats which are equal to or superior to floats meeting AmerenUE’s specifications may submit sample floats and documentation and reasoning for waiving AmerenUE’s specification. AmerenUE may require the float to be tested by an independent testing company at the manufacturer’s cost.
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Flotation Attachments
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1. Flotation shall be positively attached by the dock builder with 3/8 inch minimum diameter plated bolts, 0.120 inch minimum thickness fender washers and lock nut, to prevent the flotation from coming loose, and yet be attached in such a manner the flotation can be easily replaced if necessary. Puncturing of the encasement for attaching is unacceptable without specific approval from AmerenUE.
2. Outside J bolts are prohibited.
3. All floats must be attached in accordance with the manufacturer’s recommendation.
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Dead Load
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1. Dead load is defined as the weight of the entire dock structure including all permanent attachments such as bumpers, dock boxes, winch stands, roof structures, etc.
2. Under dead load, the distance from the top of the water to the bottom of the structural frame shall be a minimum of 7 inches. Any additions or modifications, where the pre-existing structure has less than 7 inches of freeboard, will not be permitted unless the noncompliant structure is brought up to the 7 inch minimum or the modification/addition meets or exceeds the 7 inch minimum.
3. Outer ends of finger or slip walkways shall be level or within 3 inches of the center walkway or dock to which it is attached.
4. Actual dead load freeboard shall be within plus or minus 2 inches of the dead load freeboard shown on the drawings.
5. At the outer ends of finger piers, there shall be less than 3/8 inch difference in freeboard between the outer corners per 3 feet of width.
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Vertical Live Load
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1. Deck live loading for flotation calculations on uncovered docks shall be 20 pounds per square foot (psf). Decks shall also be designed to carry a minimum 400-pound concentrated load on any 1 square foot (sq. ft.). These two loads need not occur simultaneously.
2. Roof live load for flotation and structural calculations on covered docks shall be a minimum of 11.5 psf unreduced. Flotation shall carry the full dead load of docks and roof and the roof live load.
3. The outer ends of fingers shall not lose more than 4 inches of freeboard under a concentrated load of 400 pounds placed 2 feet from the end of the finger.
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Horizontal Live Load
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1. Docks shall be able to withstand a minimum of one-foot high wave action. The specific site may warrant a larger wave loading as specified by a Registered Professional Engineer or AmerenUE.
2. Docks, roofs, anchorage, and connections shall be designed to resist the loading from a wind with 77 miles per hour (mph) design basic wind speed (using the projected area method, this wind loading is approximately 15 psf in any direction).
3. In lieu of more precise analysis, the projected area for wind loads shall be defined by the product of the distance between the extreme outer corners of the dock system and the average boat height for the entire dock system. The exposed area shall carry 100% of the projected load and an additional 15% for each hidden boat.
4. Finger piers shall be designed to withstand an impact from the average boat expected to use the slip striking the end of the finger at 10 degrees off center line moving at a speed of 2 mph (approximately 3 feet per second).
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Access Structures (Bridges/Ramps)
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- Access structures shall be designed to carry dead and live loads. Minimum live loads shall be 30 psf on deck.
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Materials
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All docks and breakwaters shall be constructed with environmentally safe materials as defined below.
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1. All steel shall be powder coated, galvanized, or painted with a primer and painted with a minimum thickness of 3.5 mils. All dock primary substructure metal and angle iron shall be a minimum of 1½ x 1½ inches x 3/16 inch or 2 x 2 inches x 1/8 inch. Round rod shall be a minimum ½ inch. Smaller thickness, nonessential frame metal and angle iron may be used when approved by a Registered Professional Engineer and shall be no less than 1 inch x 1 inch x 1/8 inch.
2. All holes, cuts, or wells on steel members shall be made prior to hot dip galvanizing or painting.
3. After assembly of new docks, repairs or modifications, etc., all welds must be touched up in the field with the appropriate coating (i.e., cold galvanizing or paint).
4. Connectors shall be plated steel or stainless steel.
5. All structural steel welding shall conform to American Welding Society Standard (AWS) D1.1, latest edition. All structural steel welding electrodes shall conform to AWS A5.1 or A5.5 E-70XX. All exposed welded connections shall be free of excessive burs and sharp edges.
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1. Cee shapes, zee shapes, and other cold rolled shapes shall be designed in accordance with the Light Gauge Structural Steel Design Handbook.
2. Cold-formed steel joists, purlins, beams, etc., shall be galvanized with a G-60 coating meeting ASTM standards or equivalent.
3. Metal panels shall be plated, galvanized, powder coated, or painted to provide adequate corrosion resistance.
4. Cold-formed structural steel and roof panels shall have gauge and strength required to resist dead loads, live loads, and construction loads.
5. Roof systems shall be designed to support the appropriate loads.
6. Roof panel design and structural load carrying capacity shall be as recommended by the panel manufacturer.
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1. Wood frame substructures are prohibited unless specifically approved by AmerenUE and engineered to meet the wave loading of the site.
2. Wood used for deck boards and banding trim must be pressure treated and be consistent with the latest Environmental Protection Agency (EPA) regulations.
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Structural framing members shall provide corrosion resistance and strength as required by a Registered Professional Engineer.
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1. Cables or chains shall be designed with a minimum working load safety factor of 3.0 for cables and 2.0 for chains.
2. All cables or chains shall be galvanized or stainless steel.
3. Anchor design shall be completed with sound engineering practice and the soil properties assumed (if soil testing was not completed) shall be shown on the plan documents. Submerged anchors must be positioned to accommodate low water levels, as not to present a navigational hazard.
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Electric Power
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Electric power extensions to boat docks are the responsibility of the applicant. All extensions of such power should be performed by a qualified electrician in conformance with local, state, and national electrical standards. In all cases power sources on boat docks or other structures near water must utilize protective measures such as Ground Fault Interrupters (GFI) or low voltage systems. Any other City or County building regulations and/or fire codes must be adhered to.
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