{"product_id":"2x4-hiline-no-1-premium-spf-kdht-s4s-dimensional-lumber","title":"2\" x 4\" Hiline #1 Premium Grade SPF KDHT S4S Dimensional Lumber","description":"\u003cstyle\u003e\n.pb-wrap{--pb-line:#e1e3e5;--pb-head:#f6f6f7;max-width:100%}\n.pb-wrap .pb-intro{margin-bottom:20px}\n.pb-acc{border:1px solid var(--pb-line);border-radius:8px;margin:0 0 8px;overflow:hidden}\n.pb-acc\u003esummary{cursor:pointer;padding:14px 16px;font-weight:600;line-height:1.35;\n list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}\n.pb-acc\u003esummary::-webkit-details-marker{display:none}\n.pb-acc\u003esummary::marker{content:\"\"}\n.pb-acc\u003esummary::after{content:\"+\";font-size:22px;font-weight:400;line-height:1;flex:0 0 auto}\n.pb-acc[open]\u003esummary::after{content:\"\\2212\"}\n.pb-acc[open]\u003esummary{border-bottom:1px solid var(--pb-line);background:var(--pb-head)}\n.pb-acc\u003esummary:hover{background:var(--pb-head)}\n.pb-acc .pb-body{padding:16px}\n.pb-acc .pb-body\u003e:first-child{margin-top:0}\n.pb-acc .pb-body\u003e:last-child{margin-bottom:0}\n.pb-q{border:0;border-bottom:1px solid var(--pb-line);border-radius:0;margin:0}\n.pb-q:last-child{border-bottom:0}\n.pb-q\u003esummary{padding:12px 0;font-weight:600}\n.pb-q[open]\u003esummary{background:transparent;border-bottom:0}\n.pb-q\u003esummary:hover{background:transparent;text-decoration:underline}\n.pb-q .pb-body{padding:0 0 12px}\n.pb-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}\n.pb-table{width:100%;border-collapse:collapse;font-size:14px;min-width:380px}\n.pb-table th,.pb-table td{border:1px solid var(--pb-line);padding:8px 10px;\n text-align:left;vertical-align:top}\n.pb-table thead th{background:var(--pb-head)}\n.pb-table caption{caption-side:top;text-align:left;font-weight:600;padding:0 0 8px}\n.pb-note{font-size:13px;opacity:.75;margin-top:16px}\n.pb-wrap a{color:#3b82f6}\n.pb-wrap a:hover{color:#2563eb}\n\u003c\/style\u003e\u003cdiv class=\"pb-wrap\"\u003e\n\u003ch2\u003e2\" x 4\" Hiline #1 Premium Grade SPF KDHT S4S Dimensional Lumber\u003c\/h2\u003e\n\u003cdiv class=\"pb-intro\"\u003e\n\u003cp\u003eThis is a 2x4 in Hiline #1 premium grade SPF (spruce-pine-fir), kiln dried and heat treated (KDHT) and surfaced smooth on all four sides (S4S). It measures 1-1\/2 in. x 3-1\/2 in. actual and comes in long 14 and 16 ft lengths.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e#1 premium grade means fewer and smaller defects than #2.\u003c\/strong\u003e That makes it a good pick for long plates, rafters, ledgers and visible framing where straighter, cleaner boards matter. Span, load and local code still decide where it can be used, so confirm with your building inspector or engineer for structural work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdetails class=\"pb-acc\"\u003e\u003csummary\u003eFeatures and Common Uses\u003c\/summary\u003e\u003cdiv class=\"pb-body\"\u003e\n\u003cul\u003e\n\u003cli\u003e#1 premium grade SPF, a framing grade with fewer and smaller knots and defects than #2\u003c\/li\u003e\n\u003cli\u003eSPF is a species group of spruce, pine and fir, light in weight and easy to cut and nail\u003c\/li\u003e\n\u003cli\u003eHeat treated (KD-HT) to a core temperature of at least 56 C for a minimum of 30 minutes\u003c\/li\u003e\n\u003cli\u003eSurfaced smooth on all four sides (S4S) for a consistent 1-1\/2 in. x 3-1\/2 in. actual size\u003c\/li\u003e\n\u003cli\u003eLong 14 and 16 ft lengths reduce splices on long runs\u003c\/li\u003e\n\u003cli\u003eNot pressure treated, so keep it dry and out of ground contact\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCommonly used for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLong wall plates and top plates\u003c\/li\u003e\n\u003cli\u003eRafters, ledgers and long blocking runs\u003c\/li\u003e\n\u003cli\u003eShop, garage and shed framing\u003c\/li\u003e\n\u003cli\u003eFurring, bracing and general carpentry\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"pb-acc\"\u003e\u003csummary\u003eSpecifications\u003c\/summary\u003e\u003cdiv class=\"pb-body\"\u003e\n\u003cdiv class=\"pb-scroll\"\u003e\u003ctable class=\"pb-table\"\u003e\n\u003ccaption\u003eProduct Specifications\u003c\/caption\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eProduct\u003c\/th\u003e\n\u003ctd\u003e2x4 Hiline #1 Premium SPF, KDHT, S4S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSpecies\u003c\/th\u003e\n\u003ctd\u003eSPF (spruce-pine-fir)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBrand line\u003c\/th\u003e\n\u003ctd\u003eHiline\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eGrade\u003c\/th\u003e\n\u003ctd\u003e#1 Premium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNominal size\u003c\/th\u003e\n\u003ctd\u003e2 in. x 4 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eActual size\u003c\/th\u003e\n\u003ctd\u003e1-1\/2 in. x 3-1\/2 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eAvailable lengths\u003c\/th\u003e\n\u003ctd\u003e14 and 16 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMoisture content\u003c\/th\u003e\n\u003ctd\u003eKiln dried, 19% maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eHeat treatment\u003c\/th\u003e\n\u003ctd\u003eKD-HT, core temperature of at least 56 C for 30 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSurfacing\u003c\/th\u003e\n\u003ctd\u003eS4S, surfaced on four sides\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePressure treated\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"pb-note\"\u003eGrade, species and heat-treatment marks are stamped on each board and are the governing record for the piece you receive. Span, load and local code decide where the lumber can be used, so confirm with your building inspector or engineer for structural work. KD-HT lumber is dried to 19% moisture content or less and heated to a core temperature of at least 56 C for 30 minutes.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"pb-acc\"\u003e\u003csummary\u003eFrequently Asked Questions\u003c\/summary\u003e\u003cdiv class=\"pb-body\"\u003e\n\u003cdetails class=\"pb-acc pb-q\"\u003e\u003csummary\u003eWhat does #1 premium grade mean?\u003c\/summary\u003e\u003cdiv class=\"pb-body\"\u003e\u003cp\u003e#1 is a visual framing grade with fewer and smaller knots, splits and other defects than #2. Premium means the boards are selected for a cleaner, straighter look, which reduces culling and waste on the job site.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"pb-acc pb-q\"\u003e\u003csummary\u003eWhat does KDHT mean?\u003c\/summary\u003e\u003cdiv class=\"pb-body\"\u003e\u003cp\u003eKDHT means kiln dried and heat treated. The board is dried to 19% moisture content or less and heated to a core temperature of at least 56 C for a minimum of 30 minutes. It is a heat process, not a chemical preservative treatment.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"pb-acc pb-q\"\u003e\u003csummary\u003eWhat is SPF?\u003c\/summary\u003e\u003cdiv class=\"pb-body\"\u003e\u003cp\u003eSPF is a commercial species group of spruce, pine and fir. The wood is light and easy to work, and it is graded and sold together as one group.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"pb-acc pb-q\"\u003e\u003csummary\u003eWhat is the actual size of a 2x4?\u003c\/summary\u003e\u003cdiv class=\"pb-body\"\u003e\u003cp\u003eA 2x4 measures 1-1\/2 in. x 3-1\/2 in. once surfaced. The 2 in. x 4 in. name is the nominal size from before the board was dried and planed.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"pb-acc pb-q\"\u003e\u003csummary\u003eWhat does S4S mean?\u003c\/summary\u003e\u003cdiv class=\"pb-body\"\u003e\u003cp\u003eS4S means surfaced on four sides. All four faces are planed smooth, so the board has square, consistent edges and no rough-sawn surface.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"pb-acc pb-q\"\u003e\u003csummary\u003eCan I use it outside?\u003c\/summary\u003e\u003cdiv class=\"pb-body\"\u003e\u003cp\u003eOnly for short-term or covered use. It is not pressure treated, so it will rot in ground contact or constant wet. For outdoor and ground-contact jobs, choose pressure treated lumber.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Product\",\"@id\":\"https:\/\/griffbuildingsupplies.com\/products\/2x4-hiline-no-1-premium-spf-kdht-s4s-dimensional-lumber#product\",\"name\":\"2\\\" x 4\\\" Hiline #1 Premium Grade SPF KDHT S4S Dimensional Lumber\",\"url\":\"https:\/\/griffbuildingsupplies.com\/products\/2x4-hiline-no-1-premium-spf-kdht-s4s-dimensional-lumber\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Griff\"},\"category\":\"Hardware \u003e Building Materials \u003e Lumber \u0026 Sheet Stock\",\"description\":\"2x4 Hiline #1 premium grade SPF lumber, kiln dried and heat treated, S4S. Actual size 1-1\/2\\\" x 3-1\/2\\\". 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