{"product_id":"4-stone","title":"#4 Stone (Crushed Granite Ballast)","description":"\u003cp\u003e\u003cstrong\u003e#4 Stone (Crushed Granite Ballast) — Large Clean Stone for Heavy Drainage \u0026amp; Deep Backfill\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e#4 Stone is the bigger-cousin spec stone — 1½\" top size, clean of fines, angular crushed granite. The size drainage engineers reach for when #57 isn't big enough: deep foundation backfill, large culvert bedding, rail-grade ballast, and the transition layer between rip rap and finer drainage stone. Meets AASHTO M43 No. 4 \/ ASTM D448 No. 4. If the spec says \"4 stone,\" this is it.\u003c\/p\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpec name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e#4 Stone (AASHTO M43 \/ ASTM D448 size No. 4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCrushed granite, native to the Boston area\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNominal size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1½\" to ¾\" (passes 2½\", retained on ¾\" sieve)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eComposition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAngular crushed granite, washed, clean of fines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~2,700 lbs per cubic yard (~1.35 tons)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 yd³ covers ~80 sq ft at 4\" depth (loose)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlso known as\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4s, AASHTO 4, ballast stone, large drainage rock, 1½\" clean\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSold by\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThe cubic yard, bulk dump truck delivery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat it's good for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDeep drainage trenches and curtain drains where #57 isn't large enough\u003c\/li\u003e\n\u003cli\u003eFoundation backfill against waterproofing membranes\u003c\/li\u003e\n\u003cli\u003eLarge culvert bedding and pipe surround\u003c\/li\u003e\n\u003cli\u003eSeptic system stone where the engineer specifies #4\u003c\/li\u003e\n\u003cli\u003eTransition layer between rip rap and #57\u003c\/li\u003e\n\u003cli\u003eHeavy-duty driveway base where settlement is a concern\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGradation (AASHTO M43 \/ ASTM D448 — Size No. 4)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSieve size\u003c\/th\u003e\n\u003cth\u003e% passing\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2½\" (63 mm)\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\" (50 mm)\u003c\/td\u003e\n\u003ctd\u003e90 – 100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1½\" (37.5 mm)\u003c\/td\u003e\n\u003ctd\u003e20 – 55\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\" (25 mm)\u003c\/td\u003e\n\u003ctd\u003e0 – 15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e½\" (12.5 mm)\u003c\/td\u003e\n\u003ctd\u003e0 – 5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eHow much do I need?\u003c\/h3\u003e\n\u003cp\u003eFor a 100 ft foundation drain trench, 2 ft wide, with 1 ft of #4 over a perforated pipe, plan on about 7.4 cubic yards. Use the material calculator at the top of the page for custom dimensions. Round up 5–10% for over-excavation and settlement.\u003c\/p\u003e\n\u003ch3\u003eHow #4 compares to neighboring sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e#4 vs. #57:\u003c\/strong\u003e #4 is larger (1½\" top vs. 1\" top). Use #4 in deeper, heavier-flow drainage; use #57 for typical French drains and septic.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e#4 vs. rip rap:\u003c\/strong\u003e Rip rap is much larger (6\"–12\"+) and used for erosion armor. #4 is the transition stone between rip rap and finer drainage rock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResidential equivalent:\u003c\/strong\u003e Same material as our \u003ca href=\"https:\/\/ottrsupply.com\/products\/crushed-gray-rock-1-5-inch\" title=\"Gray Crushed Rock 1.5 inch\"\u003eGray Crushed Rock 1.5\"\u003c\/a\u003e — two ways to ask for the same product.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is #4 stone used for?\u003c\/strong\u003e\u003cbr\u003eHeavy drainage, foundation backfill, large culvert bedding, septic stone where the engineer specifies it, and the transition layer between rip rap and smaller drainage rock. It is bigger than #57 and reserved for deeper, higher-flow applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs #4 stone the same as 1.5\" crushed?\u003c\/strong\u003e\u003cbr\u003eYes — gradationally, #4 has a 1½\" mid-band with a 2½\" top sieve. Our Gray Crushed Rock 1.5\" is the same material under its residential name.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan #4 stone be used as a driveway surface?\u003c\/strong\u003e\u003cbr\u003eIt can be used as a deep base, but the size is uncomfortable to walk and drive on as a finish. For a driveway top, use \u003ca href=\"https:\/\/ottrsupply.com\/products\/crushed-gray-rock-0-75-inch\"\u003e¾\" gray crushed\u003c\/a\u003e or \u003ca href=\"https:\/\/ottrsupply.com\/products\/57-stone\"\u003e#57 stone\u003c\/a\u003e on top of a compacted #610 base.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much does a cubic yard of #4 stone weigh?\u003c\/strong\u003e\u003cbr\u003eAbout 2,700 lbs per cubic yard, or roughly 1.35 tons.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo you deliver #4 stone in the Boston area?\u003c\/strong\u003e\u003cbr\u003eYes — same-day and next-day bulk delivery across Suffolk, Middlesex, Norfolk, and Plymouth Counties. No minimum order; flat-rate delivery shown in the price breakdown.\u003c\/p\u003e\n\u003cp\u003eSame-day and next-day bulk delivery, no minimum order. We deliver #4 stone across \u003ca href=\"https:\/\/ottrsupply.com\/collections\/suffolk-county-landscape-supply\" title=\"Suffolk County Landscape Supply\"\u003eSuffolk\u003c\/a\u003e, \u003ca href=\"https:\/\/ottrsupply.com\/collections\/middlesex-county-landscape-supply\" title=\"Middlesex County Landscape Supply\"\u003eMiddlesex\u003c\/a\u003e, \u003ca href=\"https:\/\/ottrsupply.com\/collections\/norfolk-county-landscape-supply\" title=\"Norfolk County Landscape Supply\"\u003eNorfolk\u003c\/a\u003e, and \u003ca href=\"https:\/\/ottrsupply.com\/collections\/plymouth-county-landscape-supply\" title=\"Plymouth County Landscape Supply\"\u003ePlymouth County\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003ePair with our \u003ca href=\"https:\/\/ottrsupply.com\/products\/57-stone\" title=\"#57 Stone\"\u003e#57 Stone\u003c\/a\u003e as a transition layer down to finer drainage rock, or step up to \u003ca href=\"https:\/\/ottrsupply.com\/products\/surge-stone\" title=\"Rip Rap\"\u003eRip Rap 6\"–12\"\u003c\/a\u003e for erosion armor and high-energy stream banks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOrder today — the large-spec stone engineers call out for deep drainage and heavy backfill.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is #4 stone used for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Heavy drainage, foundation backfill, large culvert bedding, septic stone where the engineer specifies it, and the transition layer between rip rap and smaller drainage rock.\"}},{\"@type\":\"Question\",\"name\":\"Is #4 stone the same as 1.5 inch crushed?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — gradationally, #4 has a 1.5 inch mid-band with a 2.5 inch top sieve. The residential name is Gray Crushed Rock 1.5 inch.\"}},{\"@type\":\"Question\",\"name\":\"Can #4 stone be used as a driveway surface?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It can be used as a deep base, but the size is uncomfortable to walk and drive on as a finish. For a driveway top, use 3\/4 inch gray crushed or #57 stone over a compacted #610 base.\"}},{\"@type\":\"Question\",\"name\":\"How much does a cubic yard of #4 stone weigh?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"About 2,700 lbs per cubic yard, or roughly 1.35 tons.\"}},{\"@type\":\"Question\",\"name\":\"Do you deliver #4 stone in the Boston area?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — same-day and next-day bulk delivery across Suffolk, Middlesex, Norfolk, and Plymouth Counties. No minimum order; flat-rate delivery shown in the price breakdown.\"}}]}\u003c\/script\u003e","brand":"Ottr Landscape Supply","offers":[{"title":"Default Title","offer_id":48928224018660,"sku":"4104","price":85.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/8528\/9700\/files\/Gray-Crushed-Rock-1.5-Inch_46ba2bc1-ca3e-4023-b7b1-ea69a93e7331.png?v=1778808929","url":"https:\/\/ottrsupply.com\/products\/4-stone","provider":"Ottr Landscape Supply","version":"1.0","type":"link"}