1a Massive bedrock: Granite, diorite 3 Hard, sound rock, minor 100 gabbro, basalt, gneiss jointing 1b Quartzite, well cemented 3 Hard, rock moderate 60 conglomerate jointing 2 Foliated bedrock: schist 3 Medium hard rock, 40 jointing 3 Sedimentary bedrock: cementation 3,4 Soft rock, moderate jointing 20 shale, siltstone, sandstone, limestone, dolomite, conglomerate 4 Weakly cemented sedimentary 3 Very Soft Rock 10 bedrock: compaction shale or other similar rock in sound condition 5 Weathered bedrock: any of the 3,5 Very Soft rock, weathered 8 above except shale and/or major jointing and fracturing 6 Slightly cemented sand and/or 7,8 Very dense 10 gravel, glacial till (basal or lodgment), hardpan 7 Gravel, widely graded sand and 6,7,8 Very 8 gravel; and granular ablation till Dense 6 Medium dense 4 Loose 2 Very loose Note 11 8 Sands and non-plastic silty sands 6,7,8,9 Dense 4 with little or no gravel (except for Medium dense 3 Class 9 materials) Loose 1 Very loose Note 11 9 Fine sand, silty fine sand, and 6,7,9 Dense 3 inorganic silt Medium dense 2 Loose 1 Very loose Note 11 10 Inorganic sandy or silty clay, clayey 5,6,10 Hard 4 sand, clayey silt, clay, or varved Stiff 2 clay; low to high plasticity Medium 1 Soft Note 11 11 Organic soils: peat, organic silt, 11 Note 11 organic clay Source: Massachusetts Building Code, Table 1804.3, 2008 3.1.2 Retaining Wall Design A retaining wall is required as part the overall building design. The east and sides of the building will have floors underground. The east side first and second floors will be completely
1a Massive bedrock: Granite, diorite gabbro, basalt, gneiss 3 Hard, sound rock, minor jointing 100 1b Quartzite, well cemented conglomerate 3 Hard, rock moderate jointing 60 2 Foliated bedrock: schist 3 Medium hard rock, jointing 40 3 Sedimentary bedrock: cementation shale, siltstone, sandstone, limestone, dolomite, conglomerate 3,4 Soft rock, moderate jointing 20 4 Weakly cemented sedimentary bedrock: compaction shale or other similar rock in sound condition 3 Very Soft Rock 10 5 Weathered bedrock: any of the above except shale 3,5 Very Soft rock, weathered and/or major jointing and fracturing 8 6 Slightly cemented sand and/or gravel, glacial till (basal or lodgment), hardpan 7,8 Very dense 10 7 Gravel, widely graded sand and gravel; and granular ablation till 6,7,8 Very Dense Medium dense Loose Very loose 8 6 4 2 Note 11 8 Sands and non-plastic silty sands with little or no gravel (except for Class 9 materials) 6,7,8,9 Dense Medium dense Loose Very loose 4 3 1 Note 11 9 Fine sand, silty fine sand, and inorganic silt 6,7,9 Dense Medium dense Loose Very loose 3 2 1 Note 11 10 Inorganic sandy or silty clay, clayey sand, clayey silt, clay, or varved clay; low to high plasticity 5,6,10 Hard Stiff Medium Soft 4 2 1 Note 11 11 Organic soils: peat, organic silt, organic clay 11 Note 11 Source: Massachusetts Building Code, Table 1804.3, 2008 3.1.2 Retaining Wall Design A retaining wall is required as part the overall building design. The east and sides of the building will have floors underground. The east side first and second floors will be completely
Design_of_Recreation_Center.docx