diff --git a/libpldm/firmware_update.c b/libpldm/firmware_update.c
index 23487eb..11007a7 100644
--- a/libpldm/firmware_update.c
+++ b/libpldm/firmware_update.c
@@ -612,3 +612,62 @@
 	}
 	return PLDM_SUCCESS;
 }
+
+int encode_request_update_req(uint8_t instance_id, uint32_t max_transfer_size,
+			      uint16_t num_of_comp,
+			      uint8_t max_outstanding_transfer_req,
+			      uint16_t pkg_data_len,
+			      uint8_t comp_image_set_ver_str_type,
+			      uint8_t comp_image_set_ver_str_len,
+			      const struct variable_field *comp_img_set_ver_str,
+			      struct pldm_msg *msg, size_t payload_length)
+{
+	if (comp_img_set_ver_str == NULL || comp_img_set_ver_str->ptr == NULL ||
+	    msg == NULL) {
+		return PLDM_ERROR_INVALID_DATA;
+	}
+
+	if (payload_length != sizeof(struct pldm_request_update_req) +
+				  comp_img_set_ver_str->length) {
+		return PLDM_ERROR_INVALID_LENGTH;
+	}
+
+	if ((comp_image_set_ver_str_len == 0) ||
+	    (comp_image_set_ver_str_len != comp_img_set_ver_str->length)) {
+		return PLDM_ERROR_INVALID_DATA;
+	}
+
+	if ((max_transfer_size < PLDM_FWUP_BASELINE_TRANSFER_SIZE) ||
+	    (max_outstanding_transfer_req < PLDM_FWUP_MIN_OUTSTANDING_REQ)) {
+		return PLDM_ERROR_INVALID_DATA;
+	}
+
+	if (!is_string_type_valid(comp_image_set_ver_str_type)) {
+		return PLDM_ERROR_INVALID_DATA;
+	}
+
+	struct pldm_header_info header = {0};
+	header.instance = instance_id;
+	header.msg_type = PLDM_REQUEST;
+	header.pldm_type = PLDM_FWUP;
+	header.command = PLDM_REQUEST_UPDATE;
+	uint8_t rc = pack_pldm_header(&header, &(msg->hdr));
+	if (rc) {
+		return rc;
+	}
+
+	struct pldm_request_update_req *request =
+	    (struct pldm_request_update_req *)msg->payload;
+
+	request->max_transfer_size = htole32(max_transfer_size);
+	request->num_of_comp = htole16(num_of_comp);
+	request->max_outstanding_transfer_req = max_outstanding_transfer_req;
+	request->pkg_data_len = htole16(pkg_data_len);
+	request->comp_image_set_ver_str_type = comp_image_set_ver_str_type;
+	request->comp_image_set_ver_str_len = comp_image_set_ver_str_len;
+
+	memcpy(msg->payload + sizeof(struct pldm_request_update_req),
+	       comp_img_set_ver_str->ptr, comp_img_set_ver_str->length);
+
+	return PLDM_SUCCESS;
+}
\ No newline at end of file
diff --git a/libpldm/firmware_update.h b/libpldm/firmware_update.h
index f7039db..b21eaff 100644
--- a/libpldm/firmware_update.h
+++ b/libpldm/firmware_update.h
@@ -15,12 +15,15 @@
  */
 #define PLDM_FWUP_DEVICE_DESCRIPTOR_MIN_LEN 5
 #define PLDM_GET_FIRMWARE_PARAMETERS_REQ_BYTES 0
+#define PLDM_FWUP_BASELINE_TRANSFER_SIZE 32
+#define PLDM_FWUP_MIN_OUTSTANDING_REQ 1
 
 /** @brief PLDM Firmware update commands
  */
 enum pldm_firmware_update_commands {
 	PLDM_QUERY_DEVICE_IDENTIFIERS = 0x01,
-	PLDM_GET_FIRMWARE_PARAMETERS = 0x02
+	PLDM_GET_FIRMWARE_PARAMETERS = 0x02,
+	PLDM_REQUEST_UPDATE = 0x10
 };
 
 /** @brief String type values defined in the PLDM firmware update specification
@@ -187,6 +190,19 @@
 	bitfield32_t capabilities_during_update;
 } __attribute__((packed));
 
+/** @struct pldm_request_update_req
+ *
+ *  Structure representing fixed part of Request Update request
+ */
+struct pldm_request_update_req {
+	uint32_t max_transfer_size;
+	uint16_t num_of_comp;
+	uint8_t max_outstanding_transfer_req;
+	uint16_t pkg_data_len;
+	uint8_t comp_image_set_ver_str_type;
+	uint8_t comp_image_set_ver_str_len;
+} __attribute__((packed));
+
 /** @brief Decode the PLDM package header information
  *
  *  @param[in] data - pointer to package header information
@@ -358,6 +374,40 @@
     struct variable_field *active_comp_ver_str,
     struct variable_field *pending_comp_ver_str);
 
+/** @brief Create PLDM request message for RequestUpdate
+ *
+ *  @param[in] instance_id - Message's instance id
+ *  @param[in] max_transfer_size - Maximum size of the variable payload allowed
+ *                                 to be requested via RequestFirmwareData
+ *                                 command
+ *  @param[in] num_of_comp - Total number of components that will be passed to
+ *                           the FD during the update
+ *  @param[in] max_outstanding_transfer_req - Total number of outstanding
+ * 											  RequestFirmwareData
+ * commands that can be sent by the FD
+ *  @param[in] pkg_data_len - Value of the FirmwareDevicePackageDataLength field
+ *                            present in firmware package header
+ *  @param[in] comp_image_set_ver_str_type - StringType of
+ *                                           ComponentImageSetVersionString
+ *  @param[in] comp_image_set_ver_str_len - The length of the
+ *                                          ComponentImageSetVersionString
+ *  @param[in] comp_img_set_ver_str - Component Image Set version information
+ *  @param[in,out] msg - Message will be written to this
+ *  @param[in] payload_length - Length of request message payload
+ *
+ *  @return pldm_completion_codes
+ *
+ *  @note Caller is responsible for memory alloc and dealloc of param
+ *        'msg.payload'
+ */
+int encode_request_update_req(uint8_t instance_id, uint32_t max_transfer_size,
+			      uint16_t num_of_comp,
+			      uint8_t max_outstanding_transfer_req,
+			      uint16_t pkg_data_len,
+			      uint8_t comp_image_set_ver_str_type,
+			      uint8_t comp_image_set_ver_str_len,
+			      const struct variable_field *comp_img_set_ver_str,
+			      struct pldm_msg *msg, size_t payload_length);
 #ifdef __cplusplus
 }
 #endif
diff --git a/libpldm/tests/libpldm_firmware_update_test.cpp b/libpldm/tests/libpldm_firmware_update_test.cpp
index 444d71c..bbd3dfa 100644
--- a/libpldm/tests/libpldm_firmware_update_test.cpp
+++ b/libpldm/tests/libpldm_firmware_update_test.cpp
@@ -1266,3 +1266,130 @@
                         entry.data() + pendingCompVerStrPos,
                         outPendingCompVerStr.length));
 }
+
+TEST(RequestUpdate, goodPathEncodeRequest)
+{
+    constexpr uint8_t instanceId = 1;
+    constexpr uint32_t maxTransferSize = 512;
+    constexpr uint16_t numOfComp = 3;
+    constexpr uint8_t maxOutstandingTransferReq = 2;
+    constexpr uint16_t pkgDataLen = 0x1234;
+    constexpr std::string_view compImgSetVerStr = "0penBmcv1.0";
+    constexpr uint8_t compImgSetVerStrLen =
+        static_cast<uint8_t>(compImgSetVerStr.size());
+    variable_field compImgSetVerStrInfo{};
+    compImgSetVerStrInfo.ptr =
+        reinterpret_cast<const uint8_t*>(compImgSetVerStr.data());
+    compImgSetVerStrInfo.length = compImgSetVerStrLen;
+
+    std::array<uint8_t, hdrSize + sizeof(struct pldm_request_update_req) +
+                            compImgSetVerStrLen>
+        request{};
+    auto requestMsg = reinterpret_cast<pldm_msg*>(request.data());
+
+    auto rc = encode_request_update_req(
+        instanceId, maxTransferSize, numOfComp, maxOutstandingTransferReq,
+        pkgDataLen, PLDM_STR_TYPE_ASCII, compImgSetVerStrLen,
+        &compImgSetVerStrInfo, requestMsg,
+        sizeof(struct pldm_request_update_req) + compImgSetVerStrLen);
+    EXPECT_EQ(rc, PLDM_SUCCESS);
+
+    std::array<uint8_t, hdrSize + sizeof(struct pldm_request_update_req) +
+                            compImgSetVerStrLen>
+        outRequest{0x81, 0x05, 0x10, 0x00, 0x02, 0x00, 0x00, 0x03, 0x00,
+                   0x02, 0x34, 0x12, 0x01, 0x0b, 0x30, 0x70, 0x65, 0x6e,
+                   0x42, 0x6d, 0x63, 0x76, 0x31, 0x2e, 0x30};
+    EXPECT_EQ(request, outRequest);
+}
+
+TEST(RequestUpdate, errorPathEncodeRequest)
+{
+    constexpr uint8_t instanceId = 1;
+    uint32_t maxTransferSize = 512;
+    constexpr uint16_t numOfComp = 3;
+    uint8_t maxOutstandingTransferReq = 2;
+    constexpr uint16_t pkgDataLen = 0x1234;
+    constexpr std::string_view compImgSetVerStr = "0penBmcv1.0";
+    uint8_t compImgSetVerStrLen = static_cast<uint8_t>(compImgSetVerStr.size());
+    variable_field compImgSetVerStrInfo{};
+    compImgSetVerStrInfo.ptr =
+        reinterpret_cast<const uint8_t*>(compImgSetVerStr.data());
+    compImgSetVerStrInfo.length = compImgSetVerStrLen;
+
+    std::array<uint8_t, hdrSize + sizeof(struct pldm_request_update_req) +
+                            compImgSetVerStr.size()>
+        request{};
+    auto requestMsg = reinterpret_cast<pldm_msg*>(request.data());
+
+    auto rc = encode_request_update_req(
+        instanceId, maxTransferSize, numOfComp, maxOutstandingTransferReq,
+        pkgDataLen, PLDM_STR_TYPE_ASCII, compImgSetVerStrLen, nullptr,
+        requestMsg,
+        sizeof(struct pldm_request_update_req) + compImgSetVerStrLen);
+    EXPECT_EQ(rc, PLDM_ERROR_INVALID_DATA);
+
+    compImgSetVerStrInfo.ptr = nullptr;
+    rc = encode_request_update_req(
+        instanceId, maxTransferSize, numOfComp, maxOutstandingTransferReq,
+        pkgDataLen, PLDM_STR_TYPE_ASCII, compImgSetVerStrLen,
+        &compImgSetVerStrInfo, requestMsg,
+        sizeof(struct pldm_request_update_req) + compImgSetVerStrLen);
+    EXPECT_EQ(rc, PLDM_ERROR_INVALID_DATA);
+    compImgSetVerStrInfo.ptr =
+        reinterpret_cast<const uint8_t*>(compImgSetVerStr.data());
+
+    rc = encode_request_update_req(
+        instanceId, maxTransferSize, numOfComp, maxOutstandingTransferReq,
+        pkgDataLen, PLDM_STR_TYPE_ASCII, compImgSetVerStrLen,
+        &compImgSetVerStrInfo, nullptr,
+        sizeof(struct pldm_request_update_req) + compImgSetVerStrLen);
+    EXPECT_EQ(rc, PLDM_ERROR_INVALID_DATA);
+
+    rc = encode_request_update_req(instanceId, maxTransferSize, numOfComp,
+                                   maxOutstandingTransferReq, pkgDataLen,
+                                   PLDM_STR_TYPE_ASCII, compImgSetVerStrLen,
+                                   &compImgSetVerStrInfo, requestMsg, 0);
+    EXPECT_EQ(rc, PLDM_ERROR_INVALID_LENGTH);
+
+    compImgSetVerStrLen = 0;
+    rc = encode_request_update_req(
+        instanceId, maxTransferSize, numOfComp, maxOutstandingTransferReq,
+        pkgDataLen, PLDM_STR_TYPE_ASCII, 0, &compImgSetVerStrInfo, nullptr,
+        sizeof(struct pldm_request_update_req) + compImgSetVerStrLen);
+    EXPECT_EQ(rc, PLDM_ERROR_INVALID_DATA);
+    compImgSetVerStrLen = static_cast<uint8_t>(compImgSetVerStr.size());
+
+    compImgSetVerStrInfo.length = 0xFFFF;
+    rc = encode_request_update_req(
+        instanceId, maxTransferSize, numOfComp, maxOutstandingTransferReq,
+        pkgDataLen, PLDM_STR_TYPE_ASCII, compImgSetVerStrLen,
+        &compImgSetVerStrInfo, nullptr,
+        sizeof(struct pldm_request_update_req) + compImgSetVerStrLen);
+    EXPECT_EQ(rc, PLDM_ERROR_INVALID_DATA);
+    compImgSetVerStrInfo.length = compImgSetVerStrLen;
+
+    maxTransferSize = PLDM_FWUP_BASELINE_TRANSFER_SIZE - 1;
+    rc = encode_request_update_req(
+        instanceId, maxTransferSize, numOfComp, maxOutstandingTransferReq,
+        pkgDataLen, PLDM_STR_TYPE_ASCII, compImgSetVerStrLen,
+        &compImgSetVerStrInfo, nullptr,
+        sizeof(struct pldm_request_update_req) + compImgSetVerStrLen);
+    EXPECT_EQ(rc, PLDM_ERROR_INVALID_DATA);
+    maxTransferSize = PLDM_FWUP_BASELINE_TRANSFER_SIZE;
+
+    maxOutstandingTransferReq = PLDM_FWUP_MIN_OUTSTANDING_REQ - 1;
+    rc = encode_request_update_req(
+        instanceId, maxTransferSize, numOfComp, maxOutstandingTransferReq,
+        pkgDataLen, PLDM_STR_TYPE_ASCII, compImgSetVerStrLen,
+        &compImgSetVerStrInfo, nullptr,
+        sizeof(struct pldm_request_update_req) + compImgSetVerStrLen);
+    EXPECT_EQ(rc, PLDM_ERROR_INVALID_DATA);
+    maxOutstandingTransferReq = PLDM_FWUP_MIN_OUTSTANDING_REQ;
+
+    rc = encode_request_update_req(
+        instanceId, maxTransferSize, numOfComp, maxOutstandingTransferReq,
+        pkgDataLen, PLDM_STR_TYPE_UNKNOWN, compImgSetVerStrLen,
+        &compImgSetVerStrInfo, nullptr,
+        sizeof(struct pldm_request_update_req) + compImgSetVerStrLen);
+    EXPECT_EQ(rc, PLDM_ERROR_INVALID_DATA);
+}