PLAN - DEAD END PLAN - BEND THRUST BLOCK DETAILS. Boston Water and Sewer Commission 980 HARRISON AVE., BOSTON, MA (617)

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1 PLAN DEAD END 980 HARRSON AVE., BOSTON, MA PLAN BEND THRUST BLOCK DETALS DETAL NO. A01a

2 PLAN TEE 980 HARRSON AVE., BOSTON, MA TYPCAL SECTON THRUST BLOCK DETALS DETAL NO. A01b

3 TABLE THRUST KPS (WATER PRESSURE = 200 P.S..) TABLE "a" DMENSON FEET PPE DAMETER NCHES 90 FTTNG OTHERS 6, 8, 10 & & " 30" PPE DAMETER NCHES ANGLE FTTNGS DEAD ENDS AND TEES /2 56 1/ /4 22 1/ DESGN THRUST BLOCKS OR OTHER SUTABLE ANCHORAGE TO SUT ACTUAL CONDTONS RENFORCNG STEEL EACH WAY TYPE THRUST BLOCK A #6 a 12 #7 a 12 #8 a 11 #8 a 8 SOL TYPE B SPECAL DESGN REQURED 1 C SPECAL DESGN REQURED TYPE THRUST BLOCK A DO NOT USE #7 a 9 #6 a 12 SOL TYPE B DO NOT USE #6 a 12 #7 a 9 C DO NOT USE #7 a 12 #5 a 9 NO RENFORCEMENT REQURED 2 THRUST BLOCK DMENSONS b = WDTH d = DEPTH HARRSON AVE., BOSTON, MA REQURED THRUST BLOCK BEARNG AREA N SQUARE FEET CHART FOR DETERMNNG REQURED CONCRETE THRUST BLOCK DMENSONS AND RENFORCNG 10 SOL TYPE A COMPACT COARSE TO FNE SAND MEDUM CLAY SOL TYPE B COMPACT WELL GRADED COARSE SAND AND GRAVEL HARD CLAY SOL TYPE C SOUND SHALE, HARD PAN, BROKEN BEDROCK EXCEPT SHALE THRUST TO BE RESSTED (KPS) THRUST BLOCK DMENSONS, TABLE AND CHART DO NOT PROJECT BEYOND CHART LMTS SHOWN AS RENFORCEMENT WLL NOT BE ADEQUATE DETAL NO. A01c

4 NOTES : All fittings shall be anchored by mechanical means or by concrete thrust blocks, or both, if required by the or as noted on the contract plans. All exposed metal shall be painted or coated. Concrete shall develop a minimum compressive stress of 3,000 p.s.i. at 28 days. Reinforcing steel shall be A.S.T.M. A615 Grade 40. Water pressure in Table 1 includes water hammer allowance. The actual method of restraint must be determined by actual field conditions. These are typical installations to be used as a guide to the designer. Final designs are subject to review by the. LLUSTRATVE PROBLEM Design a thrust block for a 671/2 bend, a 24inch diameter water main, carrying a maximum pressure of 200 p.s.i. Soil classified as a well graded compact coarse sand and gravel. SOLUTON 1. Enter Table at 24inch pipe diameter go vertically down column until opposite 671/2 angle fitting. read thrust = kips. 2. See chart immediately below Table select soil type curve reflecting actual soil classification. Type B for this problem. 3. Enter chart at thrust to be resisted and go vertically to soil type curve selected in 2 above see chart and follow illustrative problem arrow line from kip thrust to soil Type B curve. 4. From this intersection go horizontally following arrow line to intersection with required thrust block bearing area in square feet 40 square feet minimum is required to resist thrust. 5. Continue horizontally to "thrust block dimensions" column and select dimensions "b" and "d" immediately above horizontal arrow line projection. 7' 0" square thrust block required for this problem. 6. Continue horizontally to "reinforcing steel each way" column, noting columns further classification by soil type and footing type. (see "thrust block detail", for type and type requirements.) Two solutions to illustrative problem are acceptable: solution 1 type thrust block and soil type B indicate no reinforcement required. solution 2 type thrust block and soil type B indicate #5 A 12 each way required. 980 HARRSON AVE., BOSTON, MA THRUST BLOCK NOTES AND LLUSTRATVE PROBLEM DETAL NO. A01d

5 SCHEDULE OF TE RODS NUMBER OF PPE SZE RODS PER FTTNG DAMETER OF RODS 4" 12" 2 3/4" 16" 20" 24" 36" /4" 1 1/2" 1 1/2" 980 HARRSON AVE., BOSTON, MA TYPCAL THRUST RESTRANTS USNG TE RODS AND FRCTON CLAMPS DETAL NO. A01e

6 NOTE : Devices need to be placed beyond the area of restraints in accordance with manufactures recommendations. WEDGE ACTON RESTRANT DEVCE 980 HARRSON AVE., BOSTON, MA TYPCAL THRUST RESTRANT USNG WEDGE ACTON RESTRANT DEVCE TYPCAL THRUST RESTRANT WEDGE ACTON RESTRANT TYPE JONTS DETAL NO. A01f