Trinity Contractors, Inc 3/1/2017

I1 accordance with the WSDOT Geotechnical Design Manual M 46-03 and the 2 geotechnical report prepared for the project. I 3 4 7-02.3(6)A3 Casting 5 This section is revised to read: I 6 7 Concrete shall conform to Section 6-02.3(28)B, with a 28-day compressive strength as 8 specified in the Plans or the Working Drawings submittal. I9 10 7-02.3(6)A4 Excavation and Bedding Preparation 11 The last paragraph is revised to read: I 12 13 The upper layer of bedding course shall be a 6-inch minimum thickness layer of culvert 14 bedding material, defined as granular material either conforming to Section 9-03.12(3) I 15 or to AASHTO Grading No. 57 as specified in Section 9-03.1(4)C. The plan limits of the 16 culvert bedding material shall extend 1-foot beyond the plan limits of the culvert or the 17 Structure footing as applicable. The culvert bedding material shall be compacted in 18 accordance with the Section 2-09.3(1)E requirements for gravel backfill for drains. After I19 compaction, the culvert bedding material shall be screeded transversely to the specified 20 line and grade. Voids in the screeded culvert bedding material shall be filled and then 21 rescreeded prior to erecting the precast Structure. 1 22 23 7-02.3(6)63 Erection 24 The following sentence is inserted after the first sentence of the last paragraph: I 25 26 The weld-tie anchor spacing shall not exceed 6'-0". 27 I 28 The last sentence of the last paragraph is revised to read: 29 30 Keyways shall be filled with grout conforming to Section 9-20.3(2). I 31 32 7-02.3(6)C1 Casting 33 This section is revised to read: I 34 35 PRCSBC shall consist of lid elements and "U" shaped base elements. The vertical legs 36 of the "U" shaped base elements shall be full height matching the rise of the culvert, 37 except as otherwise specified for culvert spans greater than 20-feet. For PRCSBC I38 spans greater than 20-feet (as defined in Section 7-02.3(6)A1), the lid elements may 39 include vertical legs of a maximum length of 4-feet. 40 I 41 All vertical and horizontal joints of PRCBC and PRCSBC elements shall be tongue and 42 groove type joints, except PRCBC and PRCSBC of 20-foot span or less may have 43 keyway joints connected by weld-tie anchors in accordance with Section 6-02.3(25)0. I 44 The weld-tie anchor spacing shall not exceed 6'-0". There shall be at least two 45 galvanized steel tie plates across each top unit tongue and groove joint and each 46 tongue and groove joint between upper and lower units, unless otherwise shown in the I 47 Plans or required by the seismic designed completed in accordance with Section 7- 48 02.3(6)A1. 49 I 50 7-02.3(6)C3 Erection 51 This section is revised to read: 52 I I AMENDMENTS TO THE 2016 STANDARD SPECIFICATIONS BOOK Revised: 8/1/16