diff --git a/src/public/rtech/istreamdb.h b/src/public/rtech/istreamdb.h
new file mode 100644
index 00000000..bb69adcc
--- /dev/null
+++ b/src/public/rtech/istreamdb.h
@@ -0,0 +1,87 @@
+//=============================================================================//
+//
+// Purpose: stream database constants and types
+//
+//=============================================================================//
+#ifndef RTECH_ISTREAMDB
+#define RTECH_ISTREAMDB
+#include "ipakfile.h"
+
+#define STBSP_FILE_EXTENSION "stbsp"
+#define STBSP_NOMINAL_TEX_RES 4096
+
+struct MaterialGlue_t;
+struct TextureAsset_t;
+
+struct StreamDBLump_s
+{
+	uint64_t offset;
+	uint64_t count;
+};
+
+struct StreamDBHeader_s
+{
+	uint32_t magic;
+	uint16_t majorVersion;
+	uint16_t minorVersion;
+	char unkPad1[20];
+	float unk1;
+	float unk2;
+	char unkPad2[130];
+	StreamDBLump_s lumps[6];
+	char unkPad3[128];
+};
+
+struct StreamingDBPageState_s
+{
+	int page;
+	int unk;
+	char* pageData;
+	char gap_10[8];
+};
+
+struct ST_ResidentPage
+{
+	uint64_t dataOffset;
+	int dataSize;
+	float coverageScale;
+	uint16_t minCellX;
+	uint16_t minCellY;
+	uint16_t maxCellX;
+	uint16_t maxCellY;
+};
+
+struct ST_Material
+{
+	int nameOffset;
+	char unk[4];
+	PakGuid_t materialGUID;
+	char unk2[8];
+};
+
+struct StreamDB_s
+{
+	bool unk_0;
+	bool initialised;
+	char filePath[260];
+	char gap_105[2];
+	int fileHandle;
+	char gap_10b[4];
+	char* stringBuffer;
+	StreamDBHeader_s header;
+	ST_ResidentPage* residentPages;
+	MaterialGlue_t** materials;
+	ST_Material* materialInfo;
+	__int64 maxResidentPageSize;
+	StreamingDBPageState_s pageStates[4];
+	char gap_320[4];
+	PakStreamSet_e texStreamingMode;
+	int picMip;
+	float streamBspBucketBias;
+	float streamBspDistScale;
+	__int64 unk_338;
+	char gap340[72];
+	TextureAsset_t* streamableTextures[4];
+};
+
+#endif // RTECH_ISTREAMDB
diff --git a/src/rtech/CMakeLists.txt b/src/rtech/CMakeLists.txt
index 8be05513..7c065bba 100644
--- a/src/rtech/CMakeLists.txt
+++ b/src/rtech/CMakeLists.txt
@@ -42,6 +42,7 @@ add_sources( SOURCE_GROUP "LiveAPI"
 add_sources( SOURCE_GROUP "Public"
    "${ENGINE_SOURCE_DIR}/public/rtech/iasync.h"
    "${ENGINE_SOURCE_DIR}/public/rtech/ipakfile.h"
+   "${ENGINE_SOURCE_DIR}/public/rtech/istreamdb.h"
 )
 
 end_sources()