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Home My WebLink About83-1841 - Retaining Wall Replacement Details 225' Composite Decking _ or Pre -Fab Cap Proposed Finished Grade (Loam &Seed (Owner Selected)1 Elev. 8.3 4x10 Outer Wale 15 ft. x 3/4"0 Anchor Rod 11 Compacted Fill Ogee Wash Erosion Control 3x10 Inner Wale 1 Elev. 6.4 old retaining wall to 5 Workroad Leve used as sheetingdriving guide /-,be ev. 4.7 ,Wc SALTMARSH ILElev. 3.8 -' Q' Q' , ..o .... ',a.,'' p `::Q.:::' F Salvaged Compacted Fill E issti nga Limit of /-Vinyl Sheeting 6" Compacted 1-1/2" Crushed Stone Salt SALTMARSH Above Grade Below Grade UPLAND Existing Displaced 12"x 47" Concrete Retaining Wall AWL AWL SALTMARSH IU I ................. .... 4"0 Deadman 3x 1 03 / Inner Top Wale AnchorRod Elev. +8.3 a ►"11 I► 1 7■::1► 1 Original Location of Retaining Wall Loam/ Clean Medium to II) Fine Sand t- QaSTINQ WALL CONDITIONN SECTION 1 4x10 3/4" Through ^---! --- o_la Proposed 8' x 12' x 4" Concrete Deck Broom Finish (Total 9 Units) 8' 2%Sloe 8" Gravel Borrow = - = =1 I I= Reuse excavated soils as compacted backfill and Loam 10' Long Anchor Pile or as alternate 12' Long Steel Sheet or I -Beam 12' 4'-6" Elev. +3.8 1 915108 CorxcreteDecks CMW Al 915108 A female #1 added CMW Rev. 1 Des#ton 1 3 -6" 1 1 1 1 ri 10-1 7'-6' I i Elev. -3.7 Existing Building Wall Abut slab flush � with existing patio surface. 6 x 6 x W2.0 x W2.0 (8 gage) Welded Wire Mesh Sheets Max. 9'-4" - Compacted Fill Limit of E cc vation 60' I Assumed Failure Surface 5.0' Min. Contractor to provide shop drawing for the soil anchor tieback system. 18'+/- FAT 8'+/- Vinyl Sheeting Box Profile - "Clay" Color Min. Z=16.9 in^3/Ft Weep Drain Unit ®max. 8' o.c. 1"X 48" Stake/Post ® 8' o.c. (Marsh Side) FA 3 TECHNICIAL SPECIFICATIONS 1.) All wood dimension lumber shall be Southern Pine certified by the Southern Pine Inspection Bureau as No. 2 or better grade, smooth four sides (S4S) and shall be treated as recommended by the AWPA for salt water contact. limber sizes are nominal dimensions. Either full size (mill rough cut) or nominal size (S4S) timber may be used for the top wales. 2.) Hardware, rods, and steel products shall consist of structural steel shapes meetingg ASTM A36, bolts meeting ASTM A307 and Nuts meeting ASTM A 563, Grade C3 or DH3, all galvanized in accordance with ASTM A153 with 2 oz. of zinc per square foot. Alternate grades of nuts may be used if approved by the Engineer. Dock washers (3"0), standard washers and ogee washers shall be installed as indicated on the plans and galvanized as indicated above. Washers shall be used on both ends and on lag bolts with the exception of carriage bolts where washers are requried on the threaded end only. Carriage bolts shall be installed with round end on wood wale side only. All exposed steel shall be covered with a coating of bitumostic sealer. 3.) Emergency environmental controls shall be available on-site for immediate use by the Contractor in the event of an oil spill or other potential contamination event. 4.) Filter fabric shall be a strong woven geotextile drainage fabric such as Jennian woven monofilament GTF-400EO or equal. Contractor shall provide a submittal of the fabric proposed for use for review by the Engineer. Fabric shall be installed and and anchored by stone with excess provided for stone settlement. 5. Vinyl Sheet Piling shall be manufactured with an interlocking feature that ensures adjacent panels maintain alignment. Sheeting shall be homogeneous, uniform in color, free of cracks and defects. The color provided unless directed otherwise shall be "Clay". Manufacturer shall certify that the selected produce meets industry standards for Vinyl Sheet Piling. Design is based on sheeting with a minimum Section Modulus of 16.9 in 3/Ft. with on allowable design stress of 3,200 PSI. 6.) Composite Recycled Plastic Deck Lumber for the sheeting cap shall be installed as recommended by the manufacturer using fasteners approved for such installation. The recycled lumber shall be 5/4" thick x 6" wide provided in a woodland brown color unless an alternate color is selected by the owner. Confirmation of color desired must be made before ordering this product. 7.) Anchor Piles shall be treated in accordance with AWPA recommendations and shall meet ASTM D25 for Southern Yellow Pine units with a min. tip diameter of 6 inches. 8.) Drainage weep holes shall be provided at Elevation 4.8 placed at 8' o.c. along the entire length of the wall. Stone backfill (1CF) shall be provided around each drain location with a geotextile fabric encapsulating the stone. 9.) The elevations shown on this plan ore based on Mean Low Water (MLW) = 0.00 as verified by field measurements of high water levels established on site on 4/17/08. The mean tide for this site ranges from Elev. 0.00 (MLW) to Elev. 3.2 (MHW). 10.) Additional backfill soils shall be clean, granular Coarse to Medium Sand or Sandy Gravel classified in the USCS system as GW. GP, SW, SP, SP -SM, SW -SM, GW -GM or GP -GM. Backfill shall be placed in 10" layers to 95% of its maximum dry density as determined by in-situ compaction testing. A typical suitable soil would be Mass Highway Gravel Borrow. Excavated loam shall be stockpiled and reused for landscaping of the construction site. 11.) Crushed Stone shall meet Mass. Highway Standard Specifications (M2.01.1 or M2.01.4). Stone for the wall base shall be max. 1-1/2". Stone for the drains and backfill max. 3/4". 12.) Deck slab concrete shall obtain 3000 psi at 28 days cure (Max. 3/4" aggregate) proportioned in accordance with ACI -211.1 using a maximum water/cement ratio of 0.58. The slump of the mix shall be maintained between 4" and 5" during placement. 13.) A chloride free mid-range water reducing admixture shall be included in the mix meeting ASTM C-494 for Type "A" admixtures. Air content of the concrete shall be entrained between 4% to 69> A maximum of 15% of the cement shall be replaced with an approved Fly Ash. The proposed mix design shall be submitted to the Engineer for approval at least 3 days in advance of any concrete placement. 14.) Reinforcing steel shall meet consist of welded wire sheets of 6 x 6x W2.0 x W2.0 meeting ASTM A-185. Sheets shall be supported on chairs or concrete brick at 2.5" off the base gravel. 5 8"0 x 16" ®5' o.c. 4x10 treated SYP / No. 2 or better AA Bolts w/ Nuts & washers (both ends) A Silt Fence Fabric (Construction Side) TYPICALDETAIL 1 1 � meq :rM-.fie SALTMARSH 5/16"x 2-1/2 $1 Galy. Lag/�' Vinyl Sheet Pile /-Box Profile 3x8 treated SYa/ \_ 5/16"x 2-1/2- No. -1/2"No. 2 or better Galv. Lag 3/4"0 galv. rod Threaded 20" both ends or w/Turnbuckle tibbettS engineering corF 716 COUNTY STREET TAUNTON, MA 02780 tel. (508) 822934 - fax (508) 660-7811 EMAIL: tedauMon&oLown civil engineering land surveying transportation environmental permitting testing & construction services 2Q 915108 CorxcreteDecks CMW Al 915108 A female #1 added CMW Rev. Date Des#ton By M. WHITE No 41095 CIVIL Project Location Green Harbor on the Ocean 182 Baxter Avenue West Yarmouth, MA Prepared For Green Harbor Village Limited Partnership Drawing Title RETAINING WALL REPLACEMENT DETAILS COPYRIGHT® 2008 TIBBETTS ENGINEERING CORP NO PART OF THIS DRAWING MAY BE REPRODUCED, TRANSMITTED, OR STORED BY ANY MEANS, WHAT- SOEVER, WITHOUT THE EXPRESSED WRITTEN CONSENT OF TIBBETTS ENGINEERING CORP. WITH THE EXCEPTION OF ANY REGULATORY AUTHORITY WHICH MAY REPRODUCE IT IN CONJUNCTION WITH THE PERFORMANCE OF OFFICIAL BUSINESS UNDER ITS JURISDICTION. Drown by: C.M.W. Design by: C.M.W. Drawing Number Reviewed by: W P G Approved by: P.M. Project No: 11778.020 Of AGO - File: Green Harbor Sh 2 I Dote: