CONSTRUCTION SPECIFICATION FOR CHAIN LINK FENCE

Transcription

1 ONTARIO PROVINCIAL STANDARD SPECIFICATION METRIC OPSS 541 DECEMBER 1990 CONSTRUCTION SPECIFICATION FOR CHAIN LINK FENCE SCOPE REFERENCES DEFINITIONS MATERIALS TABLE OF CONTENTS Fence Fabric.02 Posts and Rails.03 Diagonal Wire Brace, Top and Bottom Wires.04 Gates.05 Fittings and Accessories.06 Zinc Coating.07 Concrete.08 Barbed Wire.09 Turnbuckles CONSTRUCTION Chain Link Fence Site Preparation.02 Line Post Installation.03 Line Posts on Concrete Barrier.04 Concrete Footings.05 Pipe Rails or Top Wires.06 Top and Bottom Wires.07 Fence Fabric.08 Site Restoration.09 Barbed Wire.10 Zinc Coating Repairs Terminal Posts Terminal Post Installation.02 Bracing.03 Concrete Footings Page 1 Rev. Date: 12/1990 OPSS 541

2 Gates Gate Installation MEASUREMENT FOR PAYMENT Actual Measurement Chain Link Fence.02 Terminal Posts.03 Gates Plan Quantity Measurement Chain Link Fence.02 Terminal Posts.03 Gates BASIS OF PAYMENT Chain Link Fence - Item Terminal Posts - Item Gates - Item SCOPE This specification covers the requirements for the construction of chain link fence REFERENCES This specification refers to the following standards, specifications or publications: Ontario Provincial Standard Specifications, Construction: OPSS 904 Concrete Structures Ontario Provincial Standard Specifications, Material: OPSS 1350 Concrete (Materials and Production) U.S. Federal Specification: FF-T-791b May 2, Turnbuckle Canadian General Standards Board: CAN M80 - Fence, Chain Link, Fabric CAN M80 - Fence, Chain Link, Framework Zinc Coated Steel CAN M82 - Fence, Chain Link, Gates Page 2 Rev. Date: 12/1990 OPSS 541

3 Canadian Standards Association: CSA-G162.1-M CSA-G164-M CSA-W59-M Methods of Determining Mass of Coating on Zinc-Coated (Galvanized) Steel Wire Hot Dip Galvanizing of Irregularly Shaped Articles Welded Steel Construction (Metal Arc Welding) DEFINITIONS For the purpose of this specification the following definitions shall apply: Fence Post: An upright tubular or fabricated steel member for supporting fencing material. Line Posts: Fence posts spaced at regular intervals between terminal posts throughout each stretch of fence. Terminal Posts: Fence posts which include end, gate, corner and straining posts. End Posts: Fence posts positioned at the ends of a stretch of fence. Gate Posts: The two fence posts forming a gateway. Corner Posts: Fence posts positioned at corners and changes or direction greater than ten degrees. Straining Posts: Fence posts positioned at changes in grade greater than thirty degrees. Top Rail: A tubular or fabricated steel section continuously joined by means of sleeves or couplings throughout each stretch of fence extending between terminal posts. Brace Rail: A tubular or fabricated steel section used for bracing terminal posts. Diagonal Brace Wire: Wire used for bracing terminal posts. Top Wire: Wire installed at the top of fence and extending throughout each stretch of fence between terminal posts. Bottom Wire: Wire installed at the bottom of fence and extending throughout each stretch of fence between terminal posts. Fittings: Mechanical connections of various designs, shapes and metals to join fence components into an integral structure. Wire Ties: Wire that is used to tie chain link fence fabric to line posts, bottom wires and top rails or top wires. Knuckled: The type of selvage obtained by interlocking adjacent wire ends, in pairs, and then bending the wire ends back into a closed loop. Barbed: The type of selvage obtained by interlocking adjacent wire ends, in pairs, and then twisting the wire at least 2 turns with the wire ends above the twist. Barbed Wire: Twisted longitudinal wires, termed line wires, to which the barbs are attached. Page 3 Rev. Date: 12/1990 OPSS 541

4 Non Shrink Cement Grout: means a bedding compound that is inert and free from shrinkage MATERIALS Fence Fabric The steel wire for chain link fence fabric shall conform to CAN M. The fabric shall be 1200 mm or 1800 mm wide with a uniform 50 mm diamond pattern chain link mesh closed at one edge by knuckling and at the other edge by twisting to form a barb. The fence wire shall be Type 1 Steel Fabric 3.5 mm dia. steel wire of one of the following types: 1. Class A, Zinc Coated, Style 2 Medium steel wire, hot-dip galvanized after weaving. 2. Class B, Vinyl Coated, Style 2 Medium steel wire, galvanized before weaving. or 3. Type 1 Steel Fabric 3.0 mm dia. steel wire, Class B Vinyl Coated, Style 3 Light steel wire, galvanized before weaving. Chain link fence placed less than 10 m from the roadway shall be constructed with materials described in (1) or (2) above. Chain link fence placed more than 10 m from the roadway may be constructed with materials described in (1), (2) or (3) above. The vinyl coating shall be grey in colour Posts and Rails All posts and rails shall be of galvanized steel pipe, and shall conform to CAN M Diagonal Wire Brace, Top and Bottom Wires The diameter of the diagonal wire brace and top wires shall be 5 mm, and the bottom wire shall be 3.5 mm. All wires shall be single strand galvanized steel wire conforming to CAN M. Top and bottom wires shall be zinc-coated with not less than 488 g/m 2 or not less than 92 g/m 2 when vinyl coated wires are used. The mass per unit area of zinc coating shall conform to CSA G162.1-M. Vinyl coated top and bottom wires shall match the colour of the vinyl coated fence fabric Gates Gates shall be in sizes defined as the distance between the inside faces of the gate posts. Gates shall be constructed from galvanized steel pipe frames and braces, conforming to CAN M. All joints shall be electrically welded and hot-dip galvanized after welding, or otherwise treated by a procedure approved by the Authority as providing equivalent protection. All gates shall be supplied with galvanized malleable iron hinges, latch and latch catch and shall be capable of opening approximately 180 degrees. Gate latches shall be suitable for the use of padlocks which can be attached and operated from either side of the gate. Gates shall be supplied completely assembled, including the fabric. Gate fabrics shall be similar to adjacent fence fabric. Page 4 Rev. Date: 12/1990 OPSS 541

5 Fittings and Accessories All required fittings and accessories and galvanizing of such material shall conform to CAN M. All posts shall be fitted with waterproof metal caps designed to fit and fasten securely over the posts and carry either the top rail, or top wire as specified. Fasteners for attaching fence fabric to posts, bottom wire, top rail or top wire shall be 3.5 mm diameter aluminum or galvanized steel wire or 1.5 mm diameter stainless steel wire. Fasteners shall be coated if the entire system is coated. Stretcher bar fastening bands shall be fabricated from 3 x 19 mm steel or 5 x 19 mm aluminum Zinc Coating Zinc coatings shall conform to CAN M, CAN M and CAN M Concrete Concrete shall conform to OPSS 1350 for 20 MPa concrete Barbed Wire Barbed wire shall conform to CAN M Turnbuckles Turnbuckles shall be drop forged steel conforming to the U.S. Federal Specification FF-T-791b Type 1, Form 1, class 4, and shall be galvanized conforming to CSA G164-M. The average overall length shall be approximately 30 cm, with ends in the closed position. Bolt diameter shall be approximately 10 mm and shall be capable of taking up a minimum of 150 mm slack CONSTRUCTION Chain Link Fence The work shall include preparation of the site, installation of line posts, concrete footings, concrete anchors, pipe rails or top wire, fence fabric, bottom wire, restoration of the site, barbed wire and zinc coating repairs Site Preparation Prior to the erection of the chain link fence the Contractor shall remove any debris and correct ground undulations so as to obtain a smooth, uniform gradient. For the fence, the Contractor shall cut off at ground level, such trees, stumps and brush and remove and dispose of such logs, debris and overhanging branches which would interfere with the erection of the fence Line Post Installation Post spacing shall be equal horizontal distances. All posts shall be placed in a vertical position and set accurately in line and position as specified by the Authority. Posts shall be cut to the required height above the ground so as to present a smooth and uniform profile. Page 5 Rev. Date: 12/1990 OPSS 541

6 Line Posts on Concrete Barrier All posts installed on a concrete barrier shall be fastened to the concrete barrier using Hilti Anchors, Type HIT C-100 with lock washers conforming to manufacturers specifications. Each post shall be fabricated with a welded steel base plate grade 300 W and conforming to the contract drawings. All welds shall be to a low hydrogen classification conforming to CSA W59-M. Manual electrodes shall be E7015, E7016 or E7018. All welds shall be continuous Concrete Footings All posts set in earth, loose or friable rock, or where overburden to solid rock is 450 mm or greater, shall be set in concrete footings, shall be rough cast in the ground and domed above grade to shed water, and to the dimensions shown in the contract. Where the size of hole exceeds the minimum dimensions of the footings, the Contractor shall either place the footing against undisturbed ground or shall backfill the hole with suitable earth material compacted to a density of 95% of maximum dry density and then bore a hole to the required minimum dimensions. All posts in solid rock or where overburden is less than 450 mm, holes for posts shall be drilled in the rock to a minimum depth of 380 mm with the diameter 25 mm greater than the outside diameter of the post. The annular space around the post shall be filled with non shrink cement grout. For footings required in concrete, non shrink cement grout shall be placed as shown in the contract, to ensure the posts are set to the specified grade. Concrete placing, curing and protection from the elements shall conform to OPSS Pipe Rails or Top Wires Pipe rails or top wires shall be fastened securely to post tops using waterproof caps. In sag locations, it may be necessary to drill the post and cap, and fasten with a bolt, to ensure a secure fit Top and Bottom Wires Top and bottom wires shall be stretched tight and securely fastened to terminal posts with turnbuckles and centre bands. One turnbuckle is to be used between end, corner, straining or gate posts Fence Fabric Fence fabric shall not be installed until the concrete footings have cured for a period of not less than 5 days. The fabric shall be stretched tight and securely fastened to end, corner, gate and straining posts with steel stretcher bars and steel or aluminum stretcher bar bands. The longitudinal axis of the diamond configuration shall be perpendicular to the slope of the pipe rail. The fabric shall be placed on the side of the post nearest the roadway, with the barbed edge at the top. The fabric shall be securely fastened to the line posts, bottom wire and top rail or top wire with tie wires. The wire ties on the top and bottom wire shall have not less than two twists. The fabric shall not be fastened to any diagonal braces with tie wires. Page 6 Rev. Date: 12/1990 OPSS 541

7 Site Restoration After fence erection, the Contractor shall clean and trim the site, and restore the ground to a neat and original condition existent prior to fencing operations Barbed Wire When specified, barbed wire shall be installed using the barbed wire arm fitting. The barbed wire arm shall be installed with the arm pointing away from the roadway Zinc Coating Repairs All abraded and damaged galvanized surfaces shall be cleaned and painted. Damaged areas shall be thoroughly wire brushed and all loose and cracked zinc coating removed, after which the cleaned area shall be painted with two coats of a zinc pigmented paint approved by the Authority for this purpose Terminal Posts The work shall include installation of end, corner, gate, straining posts and bracing Terminal Post Installation Terminal posts shall be installed conforming to clause Straining posts shall be installed at equal intervals not exceeding 150 m. Additional straining posts shall be installed where changes in vertical alignment exceed 30 degrees. Horizontal deflections of 10 degrees or more shall be considered as corners with corner posts installed Bracing A pipe or wire brace shall be placed diagonally across the panel at all end and gate posts as indicated in the contract drawings. Corner and straining posts shall be supported with diagonal braces placed on both sides of the post. In all cases the higher end of the diagonal brace shall be connected at the terminal post. End fittings for pipe braces shall be secured by a 6 mm bolt placed through the brace and fitting at both ends Concrete Footings Concrete footings for terminal posts shall conform to clause Gates The work shall include the installation of each size and type of gate, together with the necessary fittings and hardware, including construction of the gate stop in the case of double gates Gate Installation Gates shall be constructed with the fabric on the side farthest from the roadway with the barbed edge at the top. The fabric and other components used on gates shall match those of the fence and shall be subject to the same quality requirements. All gates shall have a chain hook to hold gates open and double gates shall have a steel gate centre rest with drop bolt for the closed position. Page 7 Rev. Date: 12/1990 OPSS 541

8 The surface grade within the required gate sweep area shall be low enough to permit free movement of the gate MEASUREMENT FOR PAYMENT Actual Measurement Chain Link Fence Measurement will be made in metres, following the contour of the ground, of the actual length of fence erected and shall include gate openings Terminal Posts Measurement will be made in units of each for each post erected Gates Measurement will be made in units of each, regardless of the size and type of gate erected. Double gates will be counted as one gate Plan Quantity Measurement Chain Link Fence Measurement is by Plan Quantity, as may be revised by Adjusted Plan Quantity, for the horizontal length, in metres, along the centre line of the fence, including gate openings. Where the slope of chain link fence is 10% or greater, then slope length will be used in the measurement Terminal Posts Measurement is by Plan Quantity as may be revised by Adjusted Plan Quantity, for the number of terminal posts required. The unit of measurement is each Gates Measurement is by Plan Quantity as may be revised by Adjusted Plan Quantity, for the number of gates required. Double gates will be counted as one gate. The unit of measurement is each BASIS OF PAYMENT Chain Link Fence - Item Terminal Posts - Item Gates - Item Payment at the contract price for the above item(s) shall be full compensation for all labour, equipment and material required to do the work. Page 8 Rev. Date: 12/1990 OPSS 541